Chapter 2 Survey Requirements of Craft
2.10 Surveys of Passenger Craft
These requirements apply to craft carrying more than 12 passengers. Passenger craft are subjected to the following periodical surveys:
(a) Annual Survey (b) Intermediate Survey (c) Bottom Survey (d) Special Survey (e) Boiler Survey
(f) Propeller Shaft Survey 2.10.2 Annual Survey:
In addition to the requirements of Annual Survey in 2.5, following items are also to be carried out:
(a) Hull:
(i) Bottom survey in dry dock or in water.
(ii) Inspection of the piping and valves of cross flooding system and operation tests of its remote control system. Main valves for the system are to be overhauled and inspected.
(iii) Inspection and operation test of door indicators and water leakage detectors of shell doors.
(iv) Inspection of discharge pipes and valves on shells below bulkhead deck. These valves are to be overhauled and inspected, but may be dispensed with when the bottom survey was carried out in water.
(v) Inspection and tightness test of the fixed parts of fin-stabilizers.
(vi) Inspection of all shell connections below bulkhead deck.
(vii) Inspection of gangways, all shell ports (cargo ports included), ash and rubbish chutes below the bulkhead deck.
(viii) Inspection of portlights including deadlights and securing arrangements below the bulkhead deck.
(ix) Inspection of all openings and their closures in watertight bulkheads below the bulkhe ad deck including watertight doors and operation of same.
(x) The escapes and any cross-flooding arrangement are to be checked.
(b) Machinery:
(i) Sea trials are to be carried out, if deemed necessary by the Surveyor.
(ii) The ability of the propulsion machinery to reverse the direction of the thrust of propellers and the ability to stop the craft are to be tested and verified.
(iii) Inspection of main and emergency electric power, and emergency lighting system.
(iv) Inspection of flooding detection system and/or water ingress alarm system for each watertight spaces below the bulkhead deck.
(c) Fire Protection and Fire Extinguishing System:
(i) Inspection of the general alarm system, fire alarm system, fire detection system, public addressing system, fire doors, fire dampers, draft stops and fire divisions.
(ii) Inspection and operation test of water sprinkler system including it's piping , valves, alarm system and automatic starting of fire pumps. Pressure tanks, if any, are to be pressure tested.
2.10.3 Intermediate and Special Survey
In addition to the requirements of Special Surveys in 2.7 and Annual Survey in 2.10.2 above, following items are also to be complied with.
(a) Hull:
(i) Check the light weight of the ship.
The light weight of the craft is to be checked during Special Survey. If the major conversion is found during Annual Survey or Intermediate Survey, the light weight of the craft is to be checked by the attending Surveyor.
Inclining experiments are to be carried out whenever the light weight is different from record by 2% or more or the longitudinal center of gravity is different from record by 1% of craft's length or more.
(b) Bottom Survey in dry dock is to be a part of Intermediate or Special Survey.
While the thickness measurements is carried out, if substantial corrosion is found, the extent of thickness measurements is to be increased in accordance with the requirements of Table I 2 -3. Tanks or areas where coating was found to be in GOOD condition at the previous intermediate or periodical survey may be specially considered by the Society.
(c) For Intermediate Survey - machinery, the requirements of 2.7.2 may be dispensed with at the discretion of the Society or the attending Surveyor.
Table I 2-1
Minimum Requirements for Internal Examination
at Special Surveys of Fuel Oil, Lube Oil and Fresh Water Tanks
Spaces andTanks (1),(2),(3)
SS No. 1 (Age 5)
SS No. 2 (5 < Age 10)
SS No. 3 (10 < Age 15)
SS No. 4 and Subsequent (15 < Age) Fuel oil bunker tanks
- Engine room 0 0 1 1
- Cargo length area 0 1 2(4) Half, minimum 2(4)
- If no tanks in Cargo 0 1 1 2
Length Area, additional fuel tank(s) outside of Engine Room (if fitted)
Lube oil 0 0 0 1
Fresh water 0 1 All All
Notes:
(1) These requirements apply to tanks of integral (structural) type.
(2) If a selection of tanks is accepted to be examined, then different tanks are to be examined at each Special Survey, on a rotational basis.
(3) Peak tanks (all uses) are subject to internal examination at each Special Survey.
(4) At Special Surveys No. 3 and subsequent surveys, 1 deep tank for fuel oil in the cargo length area is to be included, if fitted.
Table I 2-2
Minimum Requirements for Thickness Measurements at Special Surveys
SS No. 11. Suspect Areas throughout the vessel sections in way of cargo spaces within the amidship 0.5L(5)
3. Internals in forepeak and after peak ballast tanks
3. Internals in forepeak and after peak ballast tanks
4. All cargo hold hatch covers and coamings (plating and stiffeners)
4. All cargo hold hatch covers and coamings (plating and stiffeners) 5. All exposed main deck plating
full length
6. Representative exposed superstructure deck plating (poop, bridge, and forecastle deck)
7. Lowest strake and strakes in way of 'tween decks of all transverse bulkheads in cargo spaces together with internals in way(5) 8. All wind- and water strakes, port
and starboard, full length 9. All keel plates full length. Also,
additional bottom plates in way of cofferdams, machinery space, and aft end of tanks
10. Plating of sea chests. Shell plating in way of overboard likely to be most exposed to corrosion, considering cargo and ballast history and arrangement and condition of protective coatings.
(2) Thickness measurements of internals may be specially considered by the Surveyor if the protective coating is in Good condition.
(3) For craft less than 100 meters in length, the number of transverse sections required at Special Survey No. 3 may be reduced to 1, and the number of transverse sections required at Subsequent Special Surveys may be reduced to 2.
(4) For craft more than 100 meters in length, at Special Survey No. 3, thickness measurements of exposed deck plating within amidships 0.5 L may be required.
(5) For craft without defined cargo spaces, thickness measurements are to be taken at the appropriate, most onerous locations selected to provide the best representative sampling of areas likely to be exposed to corrosion the most.
(6) Subject to cargo hold hatch covers of approved design, which structurally have no access to the internals, thickness measurement shall be done of accessible parts of hatch covers structures.
Table I 2-3
Guidance for Additional Thickness Measurements in way of Substantial Corrosion
Structural Member Extent of Measurement Pattern of Measurement
Plating Suspect area and adjacent plates 5 point pattern over 1 m2
Stiffeners Suspect area 3 measurements each in line across web and flange
Table I 2-4
Survey Requirements for Automatic Air Pipe Heads at Special Surveys
SS No. 1(Age 5)
SS No. 2 (5 < Age 10)
SS No. 3 and subsequent (10 < Age) - 2 air pipe heads, 1 port and 1
starboard, located on the exposed decks in the forward 0.25L, preferably air pipes serving ballast tanks.
- 2 air pipe heads, 1 port and 1 starboard, on exposed decks, serving spaces aft of 0.25L, preferably air pipes serving ballast tanks.
(1), (2)
- All air pipe heads located on the exposed decks in the forward 0.25L.
- At least 20% of air pipe heads on the exposed decks serving spaces aft of 0.25L, preferably air pipes serving ballast tanks.
(1), (2)
- All air pipe heads located on the exposed decks.
(3) Notes:
(1) The selection of air pipe heads to be examined is left to the attending Surveyor.
(2) According to the results of this examination, the Surveyor may require the examination of other heads located on the exposed decks.
(3) Exemption may be considered for air pipe heads where there is substantial evidence of replacement after the last Special Survey.
Table I 2-5
Individual Wastage Allowances for Steel Craft, 90 m L
(5), (6)Ordinary and High Strength Steel Craft of all ages with Transv’ly framing Craft of all ages with a combination of transverse and longitudinal framing.
Strength Deck Plating 25% 20%
Continuous Long’l Hatch Coamings & Above
Deck Box-Girders 25% 20%
Deck Plates within Line of Hatches and at Ends. 30% 30%
Forecastle, Poop and Bridge Deck Plates;
Superstructure End Bulkheads 30% 30%
Tween Deck Plates 30% --
Sheer Strake Plates 25% 20%
Side Shell Plates 25% 25%
Bilge Strake Plates 25% 25%
Bottom Plates 25% 25%
Keel Plates(4)
Outermost Strake of Inner Bottom 30% 30%
Other Plates of Inner Bottom 30% 30%
Top Strake of Longitudinal Bulkheads and Top
Strake of Topside Tank Sloping Plating 25% 25%
Bottom Strake of Longitudinal Bulkheads 25% 25%
Other Plates of Longitudinal Bulkheads, Topside Tank Sloping Plating, Hopper Tank Sloping Plating and Transverse Bulkheads
25% 25%
Internals including Longitudinals, Girders, Transverses, Struts, Bulkhead Webs and Stringers, Brackets and Hatch Side Girders
25% 25%
Plates in way of Top of Tanks 30% 30%
Underdeck Box Girders (Long’l or Transverse) 20% 20%
Hatch Covers, Hatch coamings and brackets 30% 30%
Notes:
(1) Internals included in longitudinal strength must be continuous or be effectively developed at ends, throughout amidships 0.4L . (2) Structure must meet individual member thickness and average wastage.
(3) If design was originally approved on basis of engineering analysis (such as car carriers and other specialized craft), or if owner specially request, the wastage may be assessed on engineering basis (i.e., acceptable stress levels and structural stability).
(4) Keel plates are to be renewed when they reach the minimum allowed thickness for adjacent bottom plating.
(5) The individual wastage allowances are acceptable, provided the hull girder Section Modulus is not less than 90% of the greater Section Modulus required: a) at the time of new construction or b) Zmin by 3.2.2 of Part IIof the Rules for Steel Ships.
(6) For craft built to other society rules, that society carrying out the initial plan review is to be contacted for wastage allowances.
Table I 2-6
Individual Wastage Allowances for Steel Craft, L < 90 m
Main Deck Plating 25%
Bottom Plating 25%
Keel Plating 25%
Sheer Strake 25%
Bilge Strake 25%
Side Shell Plating 30%
Forecastle 30%
Internals and Bulkheads 30%
For craft built to other society rules, that society carrying out the initial plan review is to be contacted for wastage allowances.
Notes:
(1) Internals included in longitudinal strength must be continuous or be effectively developed at ends, throughout amidships 0.4L.
(2) The values shown in the table are the minimum requirements for individual members and plates.
(3) In addition to satisfying the individual member and plate requirements, it should be verified that the hull girder section modulus is not less than 90% of the greater Hull Girder Section Modulus required either:
a) At the time of new construction
b) 𝑍𝜎 as specified in 3.2.1 of Part XV of the Rules for Steel Ships.
(4) For craft less than 60 m in ship's length only, maximum loss of deck or bottom area is 20% of Rule required area.
(5) For craft built to other Society rules, wastage allowance based on the previous Society requirements may apply.
Table I 2-7
Aluminum Wastage Allowances for Craft, L < 90 m
Main Deck Plating 15%
Bottom Plating 15%
Keel Plating 15%
Sheer Strake 15%
Bilge Strake 15%
Side Shell Plating 20%
Forecastle 20%
Internals and Bulkheads 20%
For craft built to other society rules, that society carrying out the initial plan review is to be contacted for wastage allowances.
Chapter 3
Survey Requirements for Additional Systems and Services
3.1 General
In order to maintain a Class Notation for an additional system or service, that system, equipment, or installation is to be surveyed in accordance with this chapter.
Survey Requirements for Additional Systems and Services as specified in Part I Chapter 3 of the Rules for Steel Ships, are to be applied, if any.
Appendix 1
Loading Computer System (LCS) for Stability and Longitudinal Strength
A1.1 General Requirements
A1.1.1 Application(a) The requirements of this appendix apply to craft equipped with computer based systems for calculation and control of loading conditions for compliance with the applicable stability, longitudinal and local strength requirements.
A1.1.2 Class Notation
(a) Craft equipped with loading computer systems designed, manufactured and tested in compliance with the requirements of this appendix, for calculation and control of stability, longitudinal and local strength, may be assigned the additional class notation LCS.
A1.1.3 General requirements
(a) The Loading Computer System is regarded as supplementary to the Loading Manual and Stability Booklet and if relevant the Grain Loading Manual which are always to be provided on board.
(b) The user's manual is always to be provided for the loading computer.
(c) The user's manual and the computer software must be prepared in a language understood by the user. If this language is not English, a translation into English is to be included.
(d) If the software includes on-line interface, for instance remote tank sounding or draught reading, it is assumed that the remote system is maintained and calibrated as recommended by the manufacturers.
(e) On-line computers are to be connected through a gateway if connected to the craft's network serving main functions. The gateway shall have read only possibility unless the computer is approved for two -way communication.
(f) The software may be type approved or approved on a case by case basis for a specific craft.
(g) The software may be type approved, the validity and limitations of the type approval are to be carefully noted. If a type approval is found not to cover all parts of relevance for a specific craft, addition testing and documentation as for a case-by-case approval may be required.
A1.1.4 Documentation
(a) Hardware documentation
If the hardware is not type-approved, the concerned documentation is to be submitted.
(b) Documentation needed when software is type approved
In case of type-approved software, the following documentation is to be submitted:
(i) Preliminary test conditions (print of input and output data).
(ii) Stored characteristic data. (e.g. hydraustatics, cross curves, VCG or GM limit curves, lightweight definition, tank data and associated limits to still water shear force, bending moments and torque, as applicable, and with explanation as found necessary.)
(iii) Number, position and limits of read-out points. The shear force limits are to be specially considered for craft sides and longitudinal bulkheads. The loading computer is to take into account the local
correction of the shear forces for conditions with greater pressure differences on the craft's bottom structure.
(iv) Final test conditions (print of input and output data)
In case the user's manual is tailor made for a specific craft, the manual is to be submitted as well.
(c) Documentation needed for case-by-case approval of the software
With a case-by-case approval of the software, the following documentation is to be submitted:
(i) Software description and specifications, including flow chart.
(ii) User's manual, including flow chart.
(iii) Preliminary test conditions (print of point and output data).
(iv) Stored characteristic data. (e.g. hydrostatics, cross curves, VCG or GM limit curves, lightweight definition, tank data and associated limits to still water shear force, bending moments and torque, as applicable, and with explanation as found necessary.).
(v) Number, position and limits of read-out points
The shear force limits are to be specially considered for craft sides and longitudinal bulkheads. The loading computer is to take into account the local correction of the shear forces for conditions with greater pressure differences on the craft's bottom structure.
(vi) Final test conditions (print of input and output data) A1.1.5 General software requirements
(a) Software
(i) The software and the stored characteristic data must be protected against erroneous use.
(ii) The software design is to be such that it limits possible input errors by the user, for instance tank volume input is not to exceed maximum tank volume, or negative volume input to be accepted.
(iii) The software is to be user-friendly, preferably with graphic presentation of loading conditions and on-line user's task help.
(iv) The software is to include loading limitations. A warning is to be given if these limits are exceeded.
Note:
Loading limitations should include minimum/maximum draught, maximum trim, shear force and bending moment limits, minimum/maximum metacentric height (GM), cargo tank filling height as a function of cargo density, limits to distributed loads on deck, filling of ballast and cargo tanks etc.
(v) The software is to present relevant parameters of loading conditions, such as displacement, draughts forward, midship and aft, trim, center of gravity, metacentric height, free surface correction, shear forces, bending moments, torque and local strength as well as the limiting values for those parameters and an overall judgment whether all loading parameters are within the limiting values.
(vi) If intended for stability calculations, the software must include effect of free surface from slack tanks on the initial metacentric height (GM) and the righting lever (GZ) as well as the effect of external heeling moments, if applicable.
Note:
If the software is based on interpolation on even keel hydrostatics only, the limiting trim will be considered as maximum 1% of the ship's length.
(vii) If the software calculates damage stability, a list of damage cases is to be inc luded. Any intended loading condition must be checked for these damage cases. The results are to include the equilibrium position and the GZ curve after damage, as well as criteria control.
Software is to give an overall judgment whether all the damage cases were found comply with the applicable requirements, within an acceptable time.
(viii) If the software includes on-line interface, for instance remote tank sounding, or draught reading, a warning is to be given in case of line interface failure. Further, it is to be possible to give the on-line input manually.
(ix) In case of discrepancy between calculated and actual displacement, the software is to use the actual value and correct the center of gravity in a satisfactory manner. The normal procedure is located in the center of gravity of the deadweight.
A1.2 Approval and Testing Requirements
A1.2.1 Approval principles(a) The requirements of hardware is to be complied with the Rules.
(b) The software can be either type approved or case-by-case approved. The latter case is only in condition with system installation on board a specific craft. In either case, relevant requirements stated in section A1.1 are to be complied with.
(c) Approval and certification.
(i) Documentation according to A1.1.4 including preliminary test conditions in accordance with A1.2.2 is to be submitted for approval.
(ii) Final test conditions according to A1.2.2, are to be tested on board in presence of the Surveyor as described in A1.2.3.
(iii) Certificate of the loading computer system will be issued after checking of final test conditions on board.
A1.2.2 Test conditions (a) General
(i) Preliminary test conditions are based on estimated lightweight data. Final test conditions are those conditions which are based on lightweight data obtained from the inclining test or the lightweight survey.
(ii) Special or additional test conditions as specified in (vii) may be required by the Society in case the standard test conditions do not fully expose critical aspects of software, e.g. limitations which need to be demonstrated in particular.
(iii) The units and reference system of the test conditions are to be the same as used in the loading manual and the stability booklet.
(iv) At least 4 preliminary test conditions are to be submitted. The corresponding final test conditions are to be submitted after satisfactory result on board in presence of the Surveyor.
(v) The selected test conditions are to be representative of the service conditions and the same as the conditions presented in the approved loading manual or the stability booklet. The 4 standard test conditions are to be as follows:
(1) Light ship condition.
(2) Ballast or partly loaded condition.
(3) Fully loaded condition.
(4) Arbitrary loading condition given extreme values.
(vi) Documentation of test conditions is to include input and output data for each condition.
(vii) Additional test conditions, if required, are to be tested of limiting loading parameters, s uch as maximum draught, maximum trim or maximum KG. Further, they are to include extreme loading conditions, with varying loading parameters such as tank filling heights as a function of cargo density, limits to distributed loads on deck, shear force limits, bending moments and torque as far as applicable.
A1.2.3 Testing and certification (a) General
(i) At least 4 of the final test conditions are to be tested on board in presence of the Surveyor, before the loading computer certificate is issued.
(ii) The results from the test conditions must not deviate significantly from the results in the approved loading manual or stability booklet. If found unacceptable, the reason for the deviation is to be clarified.
(iii) A copy of the final test conditions endorsed by a Surveyor is to be kept on board.
(iv) If the final loading manual or the final stability booklet has not been approved before delivery, testing on board may take place after these documents have been approved.
Appendix 2
Guidance for Inclining Test
A2.1 General
This annex shows the standard method of inclining test.