Appendix 2

Interpretations & additional requirements

1 Towage fittings

Towage fittings must be so designed, constructed and installed as to minimise, having regard to both normal and emergency conditions, danger to personnel during towing operations and must be such as satisfy the survey authority.

2 Construction portfolio

The copy of the construction portfolio required to be carried on board a MODU by paragraph 2.8 of the 1979 MODU Code or paragraph 2.9 of the 1989 MODU Code must be maintained up to date.

3 External openings

3.1 External openings for use during operation of a MODU, while afloat, that could affect watertight integrity, including air pipes regardless of the fitting of closing appliances, ventilators, ventilation intakes and outlets, non-watertight hatches and doorways not fitted with a watertight closing appliance must be so located that their lower edges will not submerge when the MODU is inclined to the first intercept between the righting moment and wind heeling moment curves in an intact or damaged stability condition under the 1979 MODU Code or the 1989 MODU Code.

3.2 External openings such as manholes fitted with close bolted covers, small hatches and sidescuttles of a non-opening type may be so located as to submerge when the MODU is damaged as assumed by 3.5 of the 1979 MODU Code or the 1989 MODU Code.

3.3 Small hatches referred to in 3.2 are those normally used for access by personnel and must each be fitted with:

(a) a quick-acting watertight cover of steel or equivalent material acceptable to the survey authority;
(b) a visual or other alarm system arranged to show personnel, both locally and at a central position, whether the hatch covers are open or closed; and
(c) a notice board to the effect that the closing appliance is to be closed while at sea and is for temporary use only,

but are not to be regarded as emergency exits.

4 Height of coamings, etc

The height of hatch and ventilator coamings, air pipes, door sills and similar items in exposed positions and their means of closing must be determined by consideration of both intact and damage stability requirements.

5 Weathertight closing appliances

Weathertight closing appliances must be fitted to:

(a) openings that may become submerged before the heeling angle at which the minimum specified area is achieved under the intact criteria of the 1979 and 1989 MODU Codes and, for column stabilised MODUs, the damage criteria of the 1989 MODU Code; and
(b) openings that lead to spaces the volume of which is included in the calculation of cross curves of stability.

Note: Sanitary discharges originating in spaces referred to in 5(b) should be fitted with non-return valves where the discharges pass through the shell.

6 Electrical

6.1 Precautions against electric shock

In paragraph 5.5.1 of the 1979 and 1989 MODU Codes, 55V should be read as 50V in respect of a MODU built on or after 1 July 2000.

6.2 Low location lighting

A MODU constructed on or after 1 July 2000 must comply with IMO Resolution A.752(18) Guidelines for the evaluation, testing and application of low-location lighting on passenger ships.

7 Fire precautions

7.1 Fire hose specifications

A fire hose must be:

(a) constructed of material acceptable to the Chief Marine Surveyor;
(b) not more than 18 metres in length;
(c) provided with a dual purpose nozzle and the necessary couplings; and
(d) together with any necessary fittings and tools, kept ready for use in a conspicuous position near a hydrant or other connection.

7.2 Fire test procedures

A MODU constructed on or after 1 July 2000 must comply with IMO Resolution MSC.61(67) International Code for Application of Fire Test Procedures.

7.3 Sprinkler systems

A MODU constructed on or after 1 July 2000 must comply with IMO Resolution A.800(19) Revised guidelines for approval of sprinkler systems equivalent to that referred to in SOLAS Regulation II-2/12.

8 Helicopters

8.1 Helicopter deck

Where a high fire risk space is located below a helicopter deck, such space must be insulated to a standard to the satisfaction of the Chief Marine Surveyor.

8.2 Helicopter facilities

A MODU constructed on or after 1 July 2000 must comply with IMO Resolution A.855(20) Standards for on-board helicopter facilities.