(a) Short Refit. Underwater hull to be visually inspected, underwater structure graded ‘critical’ during the precedings refit are to be examined and specific defect if any to be rectified. Cathodic protection system is to be checked and repairs/renewal carried out as required.
(b) Normal Refit. Drill test survey or ultrasonic survey is to be conducted on 1/3rd of underwater hull of aircraft carrier, 50% of underwater hull of frigates, tankers, survey vessels, Utility Landing Crafts (LSTs) and depot ships and 100% of underwater hull of remaining ships. The remaining 2/3rd of underwater hull of aircraft carrier and 50% of underwater hull of frigates and above are to be usually inspected;
specific defects if any to be rectified. Cathodic protection system is to be checked and repair/renewal to be carried out.
(c) Long Refit. Drill test or ultrasonic test is to be carried out for the full underwater hull. Drill test/ultrasonic/visual survey is to be carried out for the remaining structural members as considered necessary by the refitting authority. The Cathodic protection system is to be checked and repair/renewal to be carried out.
(2) Submarines. The type of hull survey to be carried out on each refit is as follows: -
(a) Short Refit. Critical structure i.e. pressure hull pressure water tight bulkhead plates, ballast tank casing outer hull, ballast tank frames, outer hull dock conning towers, superstructure etc. are to be examined and specific defects be rectified, cathodic protection system is to be examined and repairs/renewal are to be carried out as necessary.
Sample survey of following inaccessible areas of pressure hull are to be carried out: -
(i) Inaccessible aress around the conning tower.
(ii) Areas above water line in the region of diesel engine exhaust.
(iii) Free flooding areas.
(iv) Torpedo loading hatch.
(b) Normal Refit. Ultrasonic survey of pressure hull and external tanks is to be carried out. Specific defect, if any, is to be rectified, cathodic protection system is to be examined and repairs/renewal to be carried out as necessary.
(c) Long refit. Ultrasonic survey of complete hull structure is to be carried out and defects, is any, are to be rectified. Cathodic protection system is to be examined and repairs/renewal are to be carried out.
(3) Glass Reinforced Plastic (GRP) Ships-Inspection, Testing and Survey Procedure to be followed on each Refit.
(a) Visual methods are used predominantly for inspections, testing and survey. Practically all physical testing is destructive and hence its use is limited to occasional samples from large production runs like major repair, construction of boats, domes etc,.
(b) Non-destructive physical tests are confined to those of dimensional checks, weight checks, resin hardness determination etc., using devices such as snap gauges, micrometers, scales, portable hardness gauges, etc.
(c) Type of defects found by visual inspection and their possible causes are listed below for guidelines.
Defects Possible causes
(i) Blisters Cure too rapid, mould too hoot, moisture in the resin filler or glass, resin starvation due to re-moulding layup and curing no scaling or weathering coat in case of structure in contact with water.
(ii) Pin holes Poor m ould surface, entrapped air, insufficient Pits and Voids. mould pressure, dirty mould.
(iii) Sin Monks.
(iv) Crazing. Resin rich areas caused by poor glass distribution, impacts prior to proper hardening.
(v) Ripples and Wrinkles Partial coming. Cure too rapid, use of old resin improper, use of reinforcement, washing or moving the glass, use of glass which is not compatible with particular type of resin.
(vi) Exposed Fibres Glass content too high, poor glass distribution, poor impregnation
(vii) Delamination Poor impregnation, glass content too high, improper overlaps, wrong overlap direction with respect to the direction of water flow.
(viii) Air pocket. Lay up done by untrained personnel use of low viscous binder or vertical applications, restricted pot life of binder which hardens up prior to proper impregnations and placement of reinforcement.
(4) Survey General Procedure. Carry our visual inspection/survey of all compartments including inaccessible areas covering up the shipside, bulkheads, frames, beams, grinders, deck foundations of various equipments and machineries, superstructure both internally and externally, the joint between the superstructure and the deck during refits, Normal Refit (NR) and above. During Short Refit (SR) such survey shall be carried out to the extent possible except machinery foundation since it may not be possible to inspect them.
(5) State of Deck/Hull/Bulkhead. Slicing, delamination of reinforcing layers, fittings such as stanchions, bulwork stiffers, etc., are the commonly observed defects.
Suspected are to be tested with a light hammer and a dull sound could indicate a defect beneath the top layer. Visible signs of slicing or bulging, unevenness, contour that is not gradual etc.
(6) Frames, Girders, Beams. These types of structural members are fabricated separately and are fixed with the hull/deck by means of reinforcing angles.
Check to be made to find out whether there is slicing of the angles, the main members or otherwise to be surveyed for intactness and defects such as, crazing, cracks, delamination etc.
(7) Hull. To be examined externally and internally when the ship is in dry dock. Any major defects observed and repairs effected are to be recorded in the docking report giving all particulars, such as location, nature of defect repair procedure adopted, details of materials, used etc. with a view that such repairs are examined during the subsequent docking.
4307. Survey of Yard Crafts. (1) Drill test or ultrasonic survey is to be conducted on full underwater hull during every alternate refit (24 months). Visual survey of the underwater hull is to be carried out during the other refit.
(2) The Captains of the yard are to initiate an item in the defect list when hull survey by dockyard are due to be carried out. Any proposal to prolong or curtail the period between surveys is to be referred to the Chief of the Naval Staff for consideration.
4308. Renewal of Hull Structure of Ships and Submarines. (1) Surface Ships.
(a) All main structural members normally have a corrosion allowance in scantling equal to approximately 25% of the thickness.
(b) Structures of surface ships for which the percentage reduction in scantling (K-value) exceeds the following values will require renewal:
-
(i) 40% and over for minor partitioner, superstructure and intermediate decks (non-strength decks).
(ii) 25% and over for shell plates, strength-deck plates, main bulkheads, tank tops, machinery bearers.
(iii) 30% and over for internal structure like frames, longitudinals, beams and girders.
(2) Submarines. Structure of submarine which requires renewal are as follows. The maximum overall permissible wear compared with design thickness (K- value) is indicated against each structural location: -
(a) K=6 = for pressure hull plating and frames, pressure and bulkheads, pressure bulkheads and pressure tank plates.
(b) K=15 = for pressure hull watertight bulkhead plates.
(c) K=30 = for ballast tank casing plates.
(d) K=20 = for outer hull ballast tank frames.
(e) K=35 = for outer hull plates (deck ends and conning tower superstructure etc).
4309. Ship’s Staff Survey of Maintenance Hull Structure and Fittings. (1) The commanding officer of the ship is responsible for proper maintenance of ship’s structure and fittings. The Commanding officer should carry out the periodic maintenance routines laid down in hull maintenance schedule and render regularly hull maintenance and defect return on form IN 926 and 927 respectively.
(2) In general, all maintenance schedules are based on specific periodicity.
(3) Protective Coatings. To ensure that approved paint schemes have been applied to different parts of the ship, it is essential that deteriorated coatings, rust products and contaminators are removed before hand. The extent of removal and renewal is to be determined from inspection of the existing coatings.
(4) Cathodic Protection.
(a) Ships fitted with Impressed Current Cathodic Protection (ICCP) system should carry out periodic maintenance routines as laid down in Chapter 4 of INBR 372 and orders issued by the Chief of the Naval Staff from time to time.
(b) The hull potential and anode current is to be recorded once in a day in the ship’s logbook as per table 1 of Chapter 4 of INBR 372. The data is required to be forwarded to the Chief of Naval Staff with a copy to Administrative Authority, refitting authority and Naval Chemical Metallurgical Laboratory (NCML).
(c) In the event, the system fails or hull potential readings are beyond permissible limit, ships staff are to inform Administrative Authority, NCML and Naval Dockyard and to request Naval Dockyard to provide portable handing anodes for use by the ship when alongside.
(d) Ships fitted with sacrificial anodes should measure the hull potential regularly and record the same once in a fortnight using an external zinc or silver/silver chloride reference electrode. A logbook is to be maintained to record the hull potential as per order in force. One copy of logbook is to be forwarded to the Chief of the Naval Staff with a copy to Administrative Authority, Naval Dockyard and NCML on monthly basis.
(e) Whenever the hull potential reading is found beyond permissible limit specified in Chapter 1 Para 1.13 of INBR 372, the ship’s staff are to inform administrative Authority, NCML and Naval Dockyard and to request Naval Dockyard to provide portable hanging anodes.
(f) Precautions.
(i) When ICCP system is to be operated with the ship at alongside berth, it should be ensured that all metallic contacts with ship via steel gangway and steel ropes to the jetty are removed.
(ii) Ships at alongside berths are to ensure that steel ladders, ship to ship and ship to shore are supported on rubber pads and steel ropes, for securing ships alongside.
(iii) Welding operation alongside is likely to effect the ICCP system. During electric welding, it is to be ensured that reverse polarity is avoided.
(5) Ship’s Officers Survey Report. In addition to periodical hull maintenance routines of hull structure and fittings, a thorough examination of every part of the structure fittings/machinery/seats affecting strength or watertight sub-division should be carried out by ship’s officers quarterly and a report on the condition of structure/fittings and paint work should be forwarded to the Chief of the Naval Staff with a copy to Administrative Authority and Dockyard Authority.
4310. Inspections and Test & Trials of Hull Structure & Equipment. (10 Air Testing of Compartment. To ensure the essential maintenance of watertight and gas tight integrity, ships structure are to be regularly air tested during normal refits or major refit. The list of compartments, to be air tested is laid down in each ship and submarine maintenance schedule. Complete record of all air testing are to be rendered on form IN 378.
(2) Citadel Test. In addition to general air testing of individual compartments a complete citadel test is to be carried out “on completion of normal refit/major refit” in accordance with BR 2170 Vol 2 NBCD Manual Chapter 41. A report of citadel test is to be forwarded to the Chief of the Naval Staff through Administrative Authority.
(3) Inspections & test of Life Saving Appliance. Ships staff should carry out all periodical maintenance routines of all life saving appliances i.e. life rafts, life buoys, lifting nets etc. All life rafts and survival packs complete with GRP containers are to be landed in the Dockyard’s Life Raft Repair Cell, for yearly inspection and servicing.
(4) Inspections and Test of Lifting Appliance
(a) Ships staff to carry out periodical maintenance routines of lifting appliances and associated machinery fittings as laid down in the hull maintenance schedule and orders promulgated by the Chief of the Naval Staff from time to time.
(b) All lifting appliances i.e. derrick, davit, crane winches, overhead runways, turn table, chain block, grabe etc. are to be load tested by Dockyard officers on each occasion of normal refit and major refits.
The request for such tests by dockyard are to be initiated by ships staff on defect list
(c) The interval between test should not exceed 27 months.
(5) Heeling Trials. Heeling trials are to be carried out on ships after completion of long refit/modernisation. The Commanding officer should ensure that all necessary precautions as laid down in chapter 41 of ship NBCD Manual (BR 2170) Vol II and orders issued by the Chief of the Naval Staff from time to time are being observed during trials.
(6) Insulation Test of Refrigerated Spaces. Test of insulation of all refrigerated spaces are to be carried out in accordance with General Hull Specifications after a major refit. The test period should not exceed 6 years. A trial report on Form D-741A is to be forwarded to the Chief of the Naval Staff through the Administrative Authority.
(7) Air-conditioning/Ventilation Trials. Thorough air-conditioning and ventilation trials are essential during long refits/modernisations to ensure that the designed conditions are maintained. The trials should be conducted as per procedure laid down in Section ‘R’ of Air Conditioning General Hand Book INBR 304. The results of the trial are to be tabulated in standard test sheet specified and a comprehensive report to be forwarded to the Chief of the Naval Staff with copies to Administrative Authorities and Commanding officer of the ship. The trial report should comprise of the following: -
(a) Fans & performance data.
(b) Compartment air quantities (designed and actual temperature and humidity of the compartment.
(c) Chilled water quantity and inlet/outlet temperature of each cooler.
Note: For submarines, above trials are to be conducted under various regimes of ventilation.
Separate record for each regime is to be maintained.
(8) Trial of Galleys and Bakeries. Trials of Ships’ galleys which have been modernised are to be carried out in accordance with, Procedure for the Supervision of Ships and Vessels Building by Contract (BR 1921) article 1432. The trial is to consist of operating each piece of equipment and machinery for the minimum time necessary to ascertain that it is fit to be used for its particular purpose.
(9) Laundry Trials. Whenever a large modification is effected to the existing plant, a laundry trial under working conditions is to be carried out as laid down in BR 1921 Article 1432. When minor modifications are involved it will be sufficient to test the additional items and associated services to the satisfaction of ship’s officer.
(10) Testing of Brows.
(a) Brows carried on IN ships are to be normally tested in Naval Docyards. Ships are required to add an item to their defect list to cover the testing of brows as these tests become due during major refits.
(b) The test load to be calculated from the formula area of brow in square feet Test load in tons = 14
(c) The test load ios to be evenly distributed over the length of the brow, the brow being supported at its ends in horizontal position. No end restraint is to be imparted to the brows by the supports for steel and aluminium brows. No permanent set should remain after removal of the test load. For wood brows the permanent set should not exceed 6mm per 3-metre length of brow.
(11) Return of Weights. The Admiral Superintendent of Dockyard or the Warship Production Superintendent as the case may be will render on form NSO 317 a return of weight of everything on board with other particulars required by the form on the following occasions: -
(a) With the officer’s report of the inclining experiment.
(b) After any large refit.
(c) On commissioning.
(d) The Commanding officer shall furnish the information desired by dockyard or NPS authorities which will assist in compilation of the return of weight. When actual weights are not known, they should be carefully estimated.
4311. Cleaning and Painting During Refit. (1) Cleaning and painting of the following is to be carried out by dockyard during refit and the remaining portion is to be cleaned and painted by ship’s staff.
(a) Flag Officer’s and Captain’s apartment, wardroom sickbay, and other items in the accepted work package.
(b) In submarines the control room,. Torpedo space and living spaces.
(c) Paint work damaged by the dockyard in the immediate vicinity of specific items of refitting work carried out by the dockyard.
(d) All underwater hull and fitting below the deep waterline.
(2) In the vessel undergoing a refit where a care and maintenance party or reserve complement is not attached, the cleaning and painting shall be carried out as may be arranged by the Admiral Superintendent Dockyard.
4312 – 4320 Blank.
SECTION II – GUNNERY
4321. Trials of Fitting. (1) The following instructions shall be observed in carrying out trials of the gunnery and associated electrical fittings of IN Ships.
(2) Gunnery inspections and acceptance trials in new construction ships and ships refitting, including those in reserve, shall be carried out as indicated in the table below. Detailed orders for inspection and trials and the authorities by whom these are to be carried out will be as prescribed by the Chief of the Naval Staff from time to time.
TABLE Authority for Initiating Inspections or Trials Condition of ship Authority for Initiating Inspections or Trials New construction (Contraction Built in India) The Chief of the Naval Staff.
New construction (Contraction Built outside India) The Chief of the Naval Staff.
New construction (Dockyard Built) Admiral Superintendent of the Dockyard concerned.
Refitting or conversion for service, but not Commanding officer through in reserve. Admiral Superintendent Dockyard and Administrative Authority, concerned.
Refitting or conversion before being placed Commanding officer if in in reserve. Commission otherwise Admiral Superintendent Dockyard concerned.
Refitting or conversion while in reserve. Senior Officer, Reserve Fleet.
Refitting or conversion from reserve. Commanding officer through Admiral Superintendent Dockyard and Administrative Authority concerned.
(3) Authorities responsible for initiating inspections of trials should give as much notice to conducting authorities as possible. Conducting authorities carry out their inspections and trials on behalf of ship’s officers, and in the case of equipment to be accepted from manufactures, on behalf of the Chief of the Naval Staff.
(4) Reports shall be rendered by the authority carrying out the trials as follows:-
(a) New Construction Ships and those Undergoing Conversion or Modernisation. To the Chief of the Naval Staff with copies to authorities concerned.
(b) Ships Refitting. To Administrative Authority, with copies to authorities concerned. I, however, the equipment reported on has been received from the manufactures, or if decision by the Chief of the Naval Staff is required on any item, reports shall be forwarded jointly to the Chief of the Naval Staff and the Administrative Authority.
(c) Gunnery School, Training Establishments and firing Ranges. Such units/firing ranges having equipment which requires inspection or trial, should comply with the provisions of this Regulation in so far they are applicable.
4322. When Ready to Receive Guns. The Captain shall give notice in writing. Through the Administrative Authority or Senior Officer, to the General Manager Naval Armament Stores on every occasion when the ship is ready to receive or land guns, projectiles, cordite, or other heavy armament stores.
4323 – 4325 Blank.
SECTION III – UNDERWATER WEAPONS
4326. Underwater Weapon Trials. Detailed orders for the trials will be as promulgated by the Chief of the Naval Staff.
4327. Torpedo Equipment Trials. (1) A torpedo equipment trial of all new vessels, shall be carried out by an officer nominated by the Chief of the Naval Staff, before the vessel leaves the dockyard or the contractor’s works. Abroad this trial shall be arranged for locally. The Commanding officer of the ship shall be associated in all such trials and ensure that the fittings and equipment are satisfactory. This trial is to include a trial of the torpedo control equipment.
(2) A similar trial is required after any alterations have been carried out, affecting the torpedo equipment in ship’s refitting, modernising or converting. This trial will be carried out by the Refitting Dockyard.
4328. Torpedo Discharge Trials. (1) Standard torpedo discharge trials shall be carried out by an officer nominated by the Chief of the Naval Staff in all ships having torpedo armament. First of class torpedo discharge trials shall be carried out in the first two ships of a new class after the ship is commissioned.
(2) Full speed is required for all discharge trials except those of submarines.
4329. Alignment of Torpedo Sights and Tubes. Alignment of torpedo sights and tubes in ships shall be carried out in ships under construction, and a check alignment in ships and vessels refitting is to be carried out by the Dockyard officer concerned. The necessary arrangements shall be made by the Administrative Authority. Abroad, local arrangements shall be made for check alignment.
4330. Trials of Anti Submarine (AS) Weapons, Anti Torpedo (AT) Devices, and Underwater Detection Equipment. (1) Equipment and sea-trials of underwater detection equipment, anti submarine weapons and anti-torpedo devices of all new vessels shall be carried out by an office nominated by the Chief of the Naval Staff, and of ships refitting, modernising or converting shall be carried out by the dockyard concerned, before the vessel leaves the contractor’s yard or dockyard. The Administrative Authority shall make available specialist officers to the dockyard as necessary.
(2) Similar trials are required after any major alterations have been m ade to this equipment.
4331 – 4333. Blank.
SECTION IV – MINELAYING AND MINESWEEPING GEAR
4334. Minelaying Equipment Trials. Minelaying equipment trials shall be carried out by an officer nominated by the Chief of the Naval Staff, in all vessels fitted for minelaying, before leaving the contractor’s yard or dockyard on completion, or after a refit win which alterations and additions, or repairs have been made to existing minelaying equipment. Detailed orders will be promulgated by the Chief of the Naval Staff as necessary.
4335. Minelaying Tests. To test the organisation for maintenance, preparation and issue of mines, the Flag or other officer in command of a fleet, or a flotilla, or of an area shall arrange that mines are drawn periodically from every mine depot on his station from which issues to minelayers are normally made and that these are laid under conditions favourable for the detection of any defects and their causes
4336. Minesweeping Equipment Trials. Minesweeping equipment trials shall be carried out by an officer nominated by the Chief of the Naval Staff, in all minesweepers before leaving the contractor’s yard or dockyard on completion. After a refit in which alterations and additions, or repairs, have been made to existing minesweeping equipment, the trials will be carried out by the dockyard concerned.
The Administrative Authority shall make available specialist officers to the dockyard as necessary.
4337. Blank.
SECTION V – ENGINEERING
4338. Engineering Trials. Full details of Engineering trials are given in the orders issued by the chief of the Naval Staff.
4339. Capstans etc. (1) The Captain will take care that the capstans are turned round, and that both capstan and spindle are properly lubricated once a week; also, that the spindles and deck bushes of the capstans are examined once in a every twelve months, and, also that when capstan bars are shipped they are invariably well secure and swiftered to prevent accidents.
(2) Great care shall be taken in the use of patent capstan compressors and controllers which are fitted to ships, and the directions for their use shall be strictly adhered to.
(3) In capstans where the capstan head is secured by means of screws or bolts to a disc keyed to the spindle,k the capstan head and the disc shall be parted once in every twelve months, and the bearing surfaces, keys and screws examined for deterioration by rust and any other damage, such as fractured bolts, faulty feather keys,. etc.
(4) The bearing surface shall be cleared of any rust and well greased before the capstan head and disc are rejoined. If any repairs are found to be necessary and beyond the capabilities of the ship’s staff they shall be included in the next defect list forwarded for the vessel concerned.
4340. Blank.
SECTION VI – ELECTRICAL
4341. Electrical Trials. (1) Scope of electrical equipment has been defined un der sub-regulation 2 of regulation 0606.
(2) Scope of electrical trials will be as promulgated by the Chief of the Naval Staff from time to time as applicable to following: -
(a) Pre-refit/post refit trials for existing equipment.
(b) Pre-installation/post installation trials for new construction ships.
(c) Evaluation trials for new induction equipment.
4342. Category of Electrical Trials. (1) Trials to be conducted on completion of refit, modernisation or conversion of a ship in a naval or commercial yard. These trials shall be conducted by agencies nominated by the Chief of the Naval Staff as per the trial directive promulgated.
(2) The trials on indigenous new construction ships shall be conducted in two parts viz installation inspection trials and post installation trials. The installation inspection trials shall be carried out by agency nominated and in accordance with the trials directive issued by the Chief of the Naval Staff. The post installation trials shall be conducted as specified in sub-regulation 4342 (1), Chapter 43.
(3) For ships being constructed/acquired from abroad installation inspection trials shall be conducted by the agencies nominated by the Chief of the Naval Staff.
(4) The post installation trials shall be conducted by the Delivery and Acceptance Trials team in accordance with the ship builders specification and trial directive promulgated by the Chief of the Naval Staff.
4343. Forwarding of Trials Defect Reports. (1) In case of newly constructed ships, or ships which have undergone modernisation, conversion or major repairs or in which a complete electrical system has been installed by the dockyard, the electrical trials are to be carried out in accordance with regulation 4342 (1), (2). The agencies nominated to conduct the trials shall forward the trial reports to the Chief of the Naval Staff under intimation to all concerned agencies.
(2) The Captain of the ships mentioned at regulation 4343 (1), through their respective Administrative Authorities, shall report any abnormal electrical defects discovered within three months after completion of installation and trials. The instruction does not apply to defects in design which are dealt with by Form S.316. A copy of the report shall be sent to the superintendent of the building or refitting yard if the work has been carried out in one of Indian Naval Dockyards. The report shall be limited to a statement of facts and a suggested explanation of the causes of each defect. It should not include minor defects which may be looked upon as being normal under working conditions. Such reports shall not be made the subject of correspondence between dockyard and fleet officers, except in special instances in which the Superintendent of the Dockyard concerned may desire further information
4344. Testing and Tuning. (1) Testing and tuning shall be carried out by officers of the yard in conjuction with the appropriate authorities. This should be commenced immediately after the initial installation inspection and completed before final inspection.
(2) In new construction ships and submarines, and in the case of repairs, modernisation and conversions of ships and submarines in Naval Dockyards, testing and tuning will be treated as part of the dockyard work. In all cases, the Admiral Superintendent of the Dockyard is responsible for arranging preliminary inspection, final inspection and sea trials.
4345. Sea Trials of Electrical Equipment. (1) Trials shall be carried out at sea to ascertain that all contractor’s or dockyard work has been carried out and that the equipment is working correctly and is in a fit state to be accepted by the acceptance agencies.
(2) The Captain is responsible for ensuring that satisfactory sea trials have been carried out before the ship finally leaves the dockyard.
4346. Electrical Equipment Trials inshore Establishments. (1) The testing, tuning, trials and arrangement for acceptance of electrical equipment in shore establishments are the responsibility of Administrative Authorities.
(2) The Captains of individual establishments are responsible for test and calibration of electrical equipment.
(3) The Administrative Authority shall prepare a final inspection report addressed to the Chief of the Naval Staff, copy to the Captain of the Establishment concerned.
4347. Division of Responsibility between Electrical and User Branches for the Maintenance of Electrical Equipment. (1) The ‘User’ Branch is responsible for:
-
(a) The overall operational efficiency of all equipment belonging to its departments.
(b) Ensuring that all equipment is at the required notice for service.
(c) Arranging for daily checks routine and functional tests as laid down in the relevant handbooks which do not require skilled technical knowledge, Such tests are top be continued where possible, when the ships are undergoing a refit.
(d) Arranging the sufficient sailors from the departments are made available to the maintenance staff so that periodical inspections, overhauls and skilled repair work can be carried out.
(2) The Electrical Branch is responsible for: -
(a) Maintaining all electrical equipment in a staff of operational efficiency.
(b) Testing and servicing equipment for which skilled technical knowledge is required. This is, where possible, to be continued whilst the ship is undergoing refit.
(c) Allocation of priority for maintenance work in conjuction with the user branches. The Captain of the ship is to indicate the priorities in cases where demands of the various ‘Users’ cannot be met within the time available.
(3) In cases where the duties of user and the electrical branches overlap, the division of responsibility laid down above should be shared in such a way so as to prevent breakdown and loss of efficiency in equipment and, if either occurs, the speedy restoration of equipment to operational efficiency is to be ensured.
(4) The user branches, in consultation with the electrical branch, shall ensure that before a ship is taken in hand for refit, normal checks and ship tests are carried out as laid down in the relevant publications before any defects noted are included in the defect lists. All entries in regard to electrical defects shall be made b y the Electrical officer.
4348 – 4355. Blank.
SECTION VII – VISUAL SIGNALLING (VS) EQUIPMENT
4356. VS Inspections. (1) Technical inspection of the work of fitting visual signalling equipment in all ships under construction and in ships undergoing large repairs, will be carried out by officers nominated for the purpose
(2) Preliminary VS inspections should be arranged at an early date in the ship’s programme and final VS inspection is to be carried out just prior to the inspection by the Admiral Superintendent of the Dockyard, or the officer nominate by the Chief of the Naval Staff in the case of contract built ships. Reports of all inspections are to be sent to the appropriate authorities.
(3) Detailed instructions will be as promulgated by the Chief of them Naval Staff.
4357. Blank.
SECTION VIII – ANCHORS, CHAIN CABLE, STEEL WIRE ROPE, SLINGS, RIGGING ETC.
4358. Flukes of Anchors. The arms of all anchors with moveable flukes on board Indian Naval Ships shall be moved and lubricated once a month to prevent their setting fast, see regulation 1603. The anchors which have undergone extensive repair are to be tested in accordance with Article 14, Chapter 5m BR 367 (1) of 1977.
4359. Chain Cables and Associated Equipment. (1) All chain cables are to be surveyed annually at an interval of 12 to 15 months, taking advantage, where possible, of ships refit and maintenance programme. The chain cable shall also be heat treated, retested and examined at an interval of 4 to 6 years in accordance with the procedure laid down by the Chief of the Naval Staff.
(2) The tests to be applied to the cables of Indian Fleet Auxiliaries, or other vessels classified in Llyod’s Register of shipping, shall be dealt with in accordance with orders issued by the chief of the Naval Staff.
(3) The Senior Officer ordering the survey shall arrange for an experienced blacksmith from the dockyard, or if not available one from a ship present, to assist the surveying officers.
(4) The report of survey shall be rendered in duplicate on Form IN 305 and dealt with as follows
(a) The original, duly signed and approved, shall be forwarded to the Chief of the Naval Staff.
(b) The duplicate shall be inserted in the Captain’s Ship’s Book.
(5) If cables are found defective, the steps taken to make them good shall be recorded on Form IN 305.
If new cables should be required, a demand on Form IN 936/EDPS 1, for the requisite quantity shall accompany the report, together with a letter explaining the reasons for making the demand.
(6) Periodical Examinations of Fittings. Whenever cables are periodically surveyed or tested, the eyeplates, etc, for use with anchors and chain cables will also be thoroughly examined for flaws or defects, and if there is doubt, fire-proofed and tested and the result noted on Form IN 305. The examination of eyeplates, etc., during periodical surveys of cables should be made by the ship’s staff, assistance from the dockyard being obtained if necessary, to remove fittings for fir-proof and test.
4360. Hawsers, Slips, Boar Gear and Associated Equipment. (1) All steel wire hawsers and slips, shackles, stoppers, etc., associated with them, and guard wires and chains, shall be carefully examined and have the necessary steps taken for their preservation at intervals not exceeding six months. The dates and details of these examinations shall be reported when rendering Form IN 305 in accordance with regulation 4359.
(2) All slips used for towing and taking in tow, carpenters’ stoppers, chain stoppers, shackles and slips associated with the use of steel wire hawsers shall be tested periodically as laid down for chain cables and gear and the results reported on Form IN 305.
(3) All rigging screws, including screws and slips for securing anchors davit guys, guard rails, etc., on board ship shall be worked and greased periodically at intervals not exceeding six months, and the dates on which the routine was carried out shall be reported when Form IN 305 is rendered.
(4) Boat’s slings, bridles and disengaging gear of all ships should be landed for retest on each occasion of ships refit at the nearest dockyard or place where testing facilities exist, and at all times immediately after repairs have been affected by ship’s artificers, In no case should the period between test exceed 2 1/4 years. Form In 701 shall be rendered in triplicate on each occasion. In order that attention may be drawn to possible errors before the ship leaves the port, ship’s officers should carefully scrutinise the certified tests before inserting the form in the ship’s book.
(5) The test load at the time of re-testing shall be stamped on the ring, or when the legs of double slings are tested separately on the enlarged end link.
(6) The testing of boats’ slings should be included in the periodical pink defect lists.
4361. Steel Wire Rope. The Captain shall srrange that the officers of each department on board take steps to ensure that frequent examination is made of all steel wire ropes in their departments, as well as fittings in connection therewith and all splices, with a view to eliminating as far as possible the liability to accident. In addition to these frequent examinations, all wire ropes should be subjected to a dead load test of twice the working loan, at intervals not exceeding 2 1/4 years; the rope shall be unrove by the ship’s artificers an d sent to dockyard for testing if such a test cannot be carried out on board.
4362. Blank.
SECTION IX – CRANES AND LIFTS
4363. Power Operated Deck Cranes. All electrically and hydraulically operated deck cranes shall be tested as follows:
(a) The working load shall be raised and lowered at the maximum specified radius, by means of the hoisting motion, raised and lowered by means of the topping motion of cranes so provided and slewed each way with the shop not heeled.
(b) At the maximum specified radius a load 50 per cent greater than the working load shall be raised, held, * topped* (when applicable) and slewed each way with the ship not heeled and lowered slowly so as to test all parts of the cranes.
*Except with hydraulic cranes, where the overload is to be placed on the hook, not raised or topped, and the remaining tests carried out.
(c) No greater test load than that described in sub-para (b) above should be applied to deck cranes.
(d) Electrically operated cranes should be tested in all their movements when carrying the maximum working load. The speeds of operation and motor current obtained in this test should approximate to those obtained when the cranes were installed. Where this information is not held on board, it should be obtained from the Chief of the Naval Staff.
4364. Aircraft Quick Release Coupling. The periodic testing of these couplings is to be carried out by the Admiral Superintendent, Naval Dockyards, who is to be responsible for their withdrawal from service at intervals not exceeding 18 months.
4365. Lifts. (1) All lifts in aircraft carriers shall be tested as follows:
(a) Quarterly by ship’s staff. ---- The full working load is to be raised and lowered.
(b) At each ship refit period. ------ By dockyard, subject to the period between tests not exceeding 4 years, the specified loads are to be raised and lowered slowly so as to test all parts of the lift.
(c) Bt Dockyard. ------ On all occasions after adjustments of brakes or other major work and before the lift is considered available for use it is to b e tested as in sub-regulation 1 (b) above.
(d) Tests as may be further prescribed in the relevant maintenance schedules.
(2) In lifts fitted with roller chains, the chains shall be visually inspected every three months by the ship’s staff and attention is drawn to the following;
(a) Though the operating speed of the chain is comparatively slow, it is essential that the bearing surfaces be adequately lubricated.
(b) The inside plates of the chain should be examined to se whether there are indications of rubbing against the when teeth, which would indicate mal-alignment.
The safety gear to the cages of the lifts shall be examined thoroughly cleaned and dried once a quarter by the ship’s staff.
(3) Attention is drawn to the necessity of securing lifts by tackle or other means independent of the safety gear whenever the wires are being repaired or overhauled and before men are sent to work in the lifts or trunks. When the wires of lifts are being overhauled or repaired, the safety gear shall never be relied upon as the only means of securing the lifts in position.
4366. Blank.
SECTION X – BOATS AND FLOATS
4367. Boats. (1) In all pulling and sailing boats, when swamped, positive buoyancy shall be maintained of an amount equal to at least 10 per cent of the weight of the boat complete with all fittings and equipment.
(2) All such boats shall be tested by the ship’s staff every two years, and the dates of all tests shall be marked on the inside of the transom, or inside the stern abaft the backboard where no transom exists.
(3) Dockyard officers should only be called upon to test boats that are considered by the ship’s officers, after a preliminary swamping test and careful survey, to be deficient in buoyancy, the ship’s staff assisting the dockyard as far as possible at the test so as to ensure that the ship’s officers are satisfied with the final efficiency of each boat. Any boats requiring additional buoyancy tanks should be dealt with by the dockyard.
(4) Where the buoyancy when swamped does not come up to the standard quoted above, such temporary measures as are possible should be taken until the matter can be dealt with by the dockyard on the next visit of the vessel.
(5) A report stating the results of the tests carried out by the ship’s officers should accompany the communication to the dockyard in all cases.
4368 to 4370. Blank.
SECTION XI – ARTICLES UNDER TRIAL
4371. Articles under Trial. (1) Instructions for articles to be put under trial in IN Ships, including the nature, and when practicable, the duration of the trial, will be promulgated through the Flag or other officer in command of a fleet, of flotilla or of an area.
(2) The Flag or other officers in command of a fleet, of a flotilla or of an area and Senior Officers of squadrons shall keep a record of all articles, apparatus and systems under trial in ships under their orders. Each ship shall keep a record of orders to put articles under trial and of the results thereof
(3) When a ship joins a fleet, flotilla or squadron, or is transferred to another, a list of all articles under trail, or ordered to be put under trial, shall be supplied by the Captain to the Flag or other officer in command of the fleet, of the flotilla or of the area and the Senior Officer of the squadron so that their records may be completed.
(4) If a ship is ordered to pay off into dockyard control, the Flag or other officer in command of a fleet, of a flotilla or of an area shall forward to the Chief of the Naval Staff a list of the articles under trial in the ship and is to request instructions for their disposal.
(5) These instructions do not apply to complete assemblies or sets of stores which are being developed for trial afloat.
CHAPTER 44 REPAIRS, DEFECTS, DOCKING, ALTERATIONS AND ADDITIONS Section Regulations I. Repairs and Defects 4401 – 4415 II. Docking 4416 – 4430 III. Alterations and Additions 4431 SECTION I – REPAIRS AND DEFECTS
4401. Repairs on Board. Artificers and artisans of various trades being borne in ships, and tools and materials being supplied, it is expected that repairs to stores, so far as practicable, will be executed on board; and serious notice will be taken if stores, which could have been made serviceable on board, be returned to the concerned Materials organisation, or if stores be returned in bad condition, not due to fair wear and tear. See also regulations 4406 (2) and 4408 (1).
4402. Dockyard Repairs. (1) When ships in commission come into dockyard hands to have defects made good, only such defects as have been represented by the officers of the ship and are shown in defect lists, or become apparent during the opening up necessary to make good known defects, and which may be approved to be taken in hand, shall be made good. No special examination will be made by Dockyard officers in search of further defects.
(2) The examination of the hulls of ships in commission by the Dockyard officers will take place as ordered by the Chief of the Naval Staff, quarterly examinations, by the officers of the ship being considered sufficient in the intervals.
(3) When defects of ships in commission have been made good the certificate require shall be made out on Form IN 477.
4403. Record of Defects. (1) A record of defects will be kept by each departmental officer.
(2) The Captain shall inspect these records at least once a week, and shall see that the detailed instructions issued by the Chief of the Naval Staff are duly complied with.
(3) In squadrons with a repair ship, the approval of the Flag or other Senior Officer shall be obtained before defects are included in the list of work proposed to be done by the dockyard, in order that it may be judged whether the repair ship can undertake the work, or whether it is advisable to detach the ship at once for dockyard repairs.
(4) The record of defects shall be produced on the following occasions:
(a) At annual or paying of inspection.
(b) At any time called for by the Senior Officer.
(5) When a defect list is forwarded, the record of defects shall be made available for examination by the concerned Refitting Authority if required by him. In the event of the record being handed over to the dockyard, it will be re3turned to the Captain of the ship concerned within three working days, but while it is absent from the ship, temporary arrangements will be made by the ship’s officers for making an y necessary notes, which will be transferred to the main record immediately on its return to the ship.
4404. Defects in Ships Refitted Elsewhere. (1) Whenever a ship newly commissioned or just refitted at one port, arrives at another port, and a list of defects to be made good, or of alterations required, is submitted to the Administrative Authority at such port unless the defects are evidently occasioned by stress of weather, by accident, or by collision, the Administrative Authority, or Senior Officer present, before otherwise dealing therewith, shall take the necessary steps to cause a survey to be held upon them for the purpose of inquiry.
(2) The report shall be in duplicate, one copy for the Administrative Authority, the other for the Refitting Authority. On receiving the report from the Administrative Authority, the Chief of the Naval Staff will proceed to act on the case and the relative responsibility of the several officers as may require.
4405. Dockyard Assistance in making good Defects. (1) The periods at which dockyards and Base Repair Organisations may be called on to make good defects and at which defect lists shall be rendered are:
(a) Short refits, normal refits, medium refits, long refits, modernisation and conversions.
(b) At intermediate docking periods. Normally on these occasions only underwater defects shall be dealt with, together with those which are absolutely essential for operations efficiency and cannot possibly await the next refit.
(2) Only in exceptional circumstances will dockyard assistance be rendered in making good the defects at other than the above periods. Such assistance will be confined to defective items which are essential to render a ship operational. Any such item should be reported to the Administrative Authority and Refitting Authority by signal.
(3) The above instructions apply to assistance required from dockyard and Base Repair Organisation. They do not affect the authorised practice of obtaining assistance in making good the defects from a depot or repair ship, or training establishment, or from other ships in the Squadron or Fleet or Base Maintenance Units (BMU/FMU).
(4) Dockyards and Base Repair Organisations shall not be called upon to render assistance in making good defects simply by virtue of the ship being preset at a dockyard port.
(5) Administrative Authorities shall ensure that all items of defects which the regulations lay down as responsibility of the ship’s staff, FMU/BMUs are undertaken by them, see regulation 4409. On no account are such items to appear in the defect lists presented to the dockyards.
(6) During Self Maintenance Periods (SMP) the demand of the dockyards and Base Repair Organisations should be limited to the supply of electric power, stem for domestic heating, compressed air and water, and to such work which is essential to enable ship’s staff to carry out as much work as possible.
4406. Defect Lists. (1) Lists of defects of ships (actual defects arising from wear and tear or accident) shall b e forwarded to the Administrative Authority for onward transmission to the Refitting Authority, as per the programme promulgated by the latter. A copy of the vetted defect list shall be forwarded by the Administrative Authority to the Chief of the Naval Staff so as to reach him at least one week before the commencement of the refit. Only those defects which are beyond the capabilities or resources of the ship’s staff, FMU/BMU, shall be included in these forms. The object of this is to able the Dockyard officers to form a good idea of the extent of the work required, and of the approximate cost involved, also to enable any preliminary work that is possible to be put in hand prior to commencement of refit.
(2) The defect list is to be complied as follows: -
(a) Part I shall contain the maintenance routines which are/would fall due by end of refit by time interval or running hours.
(b) Part II is to contain a list of all known defects.
(c) Part III is to contain alterations and additions and minor modifications.
Authority letter/reference for each item is to be quoted.
(3) The nature of each defect shall be stated concisely and specifically. The words “necessary”, “as required”, etc., should be avoided. If any authority exists for an item, this shall be quoted, Should a defect be related to an alteration, a note to this effect shall be inserted.
(4) If the Dockyard officers consider that a visit to the ship would facilitate the carrying out of refit and shorten the time required for the ship to be in dockyard hands, the Refitting Authority will communicate direct by signal with the Operational Authority of the ship, to ascertain the most convenient day for the officers to visit the ship, in order to examine with the ships’ officers the items of work to be undertaken during the refit.
(5) Whenever the defects of a ship are examined by the Senior Office, Refitting Authority or other representative, the Captain of the ship shall accompany the inspecting officer round the ship, and explain all the important items of repair which cannot be done by ship’s staff.
(6) The Captain shall be responsible for keeping the Operational Authority, informed of any work taken in hand or proposed to be taken in hand by the dockyard, which would affect the date on which his ship would be ready for service.
(7) The attention of the Captain is especially called to the certificate on the front page of Forms IN 488 and IN 347 which places the responsibility upon him for the proposals made in the defect list.
(8) He shall ascertain, by reference to the “Record of Defects” (see regulation 4403), whether all the items necessary are included in the list of defects presented for his signature, and that no existing defects have been concealed.