Examination and testing, general requirement for all crafts

5.3.1 All spaces within the hull and superstructure are to be examined.

5.3.2 Double bottom compartments and all integral tanks are to be tested by a head, which gives the maximum pressure expected in service.

Tanks, forming part of the underwater shell plating, may be tested afloat provided their internal examination is also carried out afloat.

5.3.3 All watertight bulkheads are to be examined.

5.3.4 All decks, casings and superstructures are to be examined. Attention is to be given to the corners of

openings and other discontinuities in the hull structure.

5.3.5 The masts, standing rigging and anchors are to be examined.

5.3.6 The steering gear, and its connections and control systems (main and alternative) are to be examined. The various parts of the auxiliary steering gear are to be assembled and examined.

5.3.7 The hand pumps and suctions, watertight doors, air and sounding pipes are to be examined.

5.3.8 The Surveyor is to satisfy himself regarding the efficient condition of the following:

• Means of escape from machinery spaces, crew and passenger spaces and spaces where crew are normally employed;

• Means of communication between bridge and engine room and between bridge and alternative steering position;

• Helm indicator.

5.3.9 The chain cables are to be ranged and anchors and the chain cables are to be examined.

5.3.10 Any length of chain cable which is found to have reduced in mean diameter at its most worn part by more than 12 per cent of its original rule diameter is to be renewed. The windlass is to be examined 5.4 Examination and testing – Additional items for steel craft

5.4.1 All tanks are to be examined internally in accordance with the requirements of Table 5.4.1.

5.4.2 For spaces used for salt water ballast, excluding double bottom tanks, where a protective coating is found in POOR condition (See Table 5.5.6 for definition) and it is not renewed or where a protective coating was not applied from the time of construction, maintenance of class will be subject to the space in question being internally examined and gauged as necessary at annual surveys.

When extensive corrosion is found, thickness gauging is to be carried out.

Indian Register of Shipping

Table 5.2.1 : Survey preparation Special Survey I

(Craft 5 years old)

Special Survey II (Craft 10 years old)

Special Survey III (Craft 15 years old) and subsequent special surveys i) The interior of the craft is to

be sufficiently opened out by the removal of lining, ceiling/cabin sole, portable tanks and ballast, etc. as required in order that the Surveyor may be satisfied as to the condition of suspect areas of the structure. A record is to be made of those areas where lining, ceiling/cabin sole etc., were opened out and where equipment was removed during the survey. This record is to be retained for reference during subsequent surveys.

ii) Machinery compartments, fore and aft peaks and other spaces as directed by the Surveyor, are to be cleared and cleaned as necessary, and the bilges and limbers all fore and aft are to be cleaned and prepared for examination. Platform plates in engine spaces are to be lifted as may be necessary for the examination of the structure below. Where necessary, pipework may be required to be removed for examination of the structure.

iii) In way of the single and/or double bottom areas, a sufficient amount of ceiling/cabin sole is to be lifted to permit examination of the bilges and/or tanktops below.

iv) All integral tanks are to be cleaned as necessary to permit examination (for steel craft see Table 3.5.2).

In addition to the requirements for Special Survey I, the following are to be complied with:

i) The chain locker is to be cleared and cleaned internally for examina- tion of the structure and examination of the cable securing arrangements.

The rudder is to be unshipped for examination of the rudder stock and trunk at the discretion of the Surveyor.

In addition to the requirements for Special Survey II the following are to be complied with:

i) Linings, ceiling/cabin soles, etc. are to be removed as required in order that the Surveyor may be satisfied as to the condition of the structure.

For steel craft:

ii) Portions of wood sheathing, or other covering, on steel decks are to be removed, as considered necessary by the Surveyor, in order to ascertain the condition of the plating.

iii) Where spaces are insulated, sufficient insulation is to be removed in each space to enable the Surveyors to be satisfied with the condition of the structure.

iv) Linings are to be removed in way of shell plating immediately above tank top connections to the side shell, in way of galleys/washrooms and beneath portlights and windows.

Table 5.4.1 : Tank internal examination requirements for steel craft Tank Special Survey

I (Craft 5 years old)

Special Survey II (Craft 10

years old)

Special Survey III (Craft 15

years old)

Special Survey IV (Craft 20

years old)

All subsequent Special Surveys

Peaks All tanks All tanks All tanks All tanks All tanks

Salt water ballast

All tanks All tanks All tanks All tanks All tanks

Lubricating oil None None See Note 2 See Note 3 All tanks

Fresh water None See Note 1 See Note 2 See Note 3 All tanks

Oil fuel None See Note 1 See Note 2 See Note 3 All tanks

Sanitary All tanks All tanks All tanks All tanks All tanks

NOTES:

1. Tanks (excluding peak tanks) used exclusively for oil fuel or fresh water need not all be examined internally provided that the Surveyor is satisfied with the condition, after both external examination and testing and from an internal examination of the after end of one forward double bottom tank and of one selected deep tank.

2. Tanks (excluding peak tanks) used exclusively for oil fuel, oil fuel and fresh water ballast, or lubricating oil, need not all be examined internally provided that the Surveyor is satisfied with the condition, after both external examination and testing and from an internal examination of one double bottom tank forward and one aft and one deep tank.

3. Tanks (excluding peak tanks) used exclusively for oil fuel, oil fuel and fresh water ballast, or lubricating oil, need not all be examined internally provided that the Surveyor is satisfied with the condition, after both external examination and testing and from internal examination of a least one double bottom tank amidships, one forward and one aft and one deep tank.

4. When examining tanks internally the Surveyor is to verify that striking plates or other additional reinforcement is fitted under sounding pipes. In the case of tanks fitted only with remote gauging facilities, the satisfactory operation of the gauges is to be confirmed.

5.4.3 For salt water double bottom tanks where a protective coating is found in POOR condition and it has not been repaired or where a protective coating was not applied from the time of construction, the maintenance of class may, at the discretion of IRS, be subject to the spaces in question being examined and gauged as necessary at annual surveys.

When extensive corrosion is found, thickness gauging is to be carried out.

5.4.4 Wooden decks or sheathings are to be examined and if decay or rot is found or the wood is excessively worn, the wood is to be renewed.

Attention is to be given to the condition of the plating under wood decks, sheathing or other deck coverings. Removal of such coverings may be dispensed with if they are found to be sound and adhering satisfactorily to the plating.

5.4.5 The structure in way of bimetallic connections e.g. to aluminium alloy deckhouses is to be examined.

5.4.6 The Surveyors may require to measure the thickness of the material in any portion of the structure where signs of wastage are evident or wastage is normally found. Any parts of the structure which are found defective or excessively reduced in scantlings are to be made good by materials of the approved scantlings and quality. The minimum requirements for thickness measurements are given in 5.5.