Part B - Requirements for Passenger Craft

 Where compliance with this chapter requires consideration of the effects of passenger weight, the following information should be used:

• .1 The distribution of passengers is 4 persons per square metre.

• .2 Each passenger has a mass of 75 kg.

• .3 Vertical centre of gravity of seated passengers is 0.3 m above seat.

• .4 Vertical centre of gravity of standing passengers is 1.0 m above deck.

• .5 Passengers and luggage should be considered to be in the space normally at their disposal.

• .6 Passengers should be distributed on available deck areas towards one side of the craft on the decks where muster stations are located and in such a way that they produce the most adverse heeling moment.

 The craft should have sufficient intact stability that, when in still water conditions, the inclination of the craft from the horizontal would not exceed 10° under all permitted cases of loading and uncontrolled passenger movements as may occur.

  2.12.1 The total heel angle in still water due to the effect of passenger movements and due to beam wind pressure as per 1.1.4 of annex 6 should not exceed 10°.

  2.12.2 In all loading conditions, the outward heel due to turning should not exceed 8°, and the total heel due to beam wind pressure as per 1.1.4 of annex 6 and due to turning should not exceed 12° outward.

 Following any of the postulated damages detailed in 2.6.5 to 2.6.8, the craft in still water should have sufficient buoyancy and positive stability to simultaneously ensure that:

• .1 after flooding has ceased and a state of equilibrium has been reached, the final waterline be 300 mm below the level of any opening through which further flooding could take place;

• .2 the angle of inclination of the craft from the horizontal does not normally exceed 10° in any direction. However, where this is clearly impractical, angles of inclination up to 15° immediately after damage but reducing to 10° within 15 min may be permitted provided that efficient non-slip deck surfaces and suitable holding points, e.g., holes, bars, etc., are provided;

• .3 there is a positive freeboard from the damage waterline to survival craft embarkation positions;

• .4 any flooding of passenger compartments or escape routes which might occur will not significantly impede the evacuation of passengers;

• .5 essential emergency equipment, emergency radios, power supplies and public address systems needed for organizing the evacuation remain accessible and operational;

• .6 the residual stability of multihull craft complies with the appropriate criteria as laid out in annex 7; and

• .7 residual stability of any other craft meets the requirements of regulation II-1/8 of the Convention.

  2.14.1 At periodical intervals not exceeding five years, a lightweight survey should be carried out on all passenger craft to verify any changes in lightweight displacement and longitudinal centre of gravity. The passenger craft should be re-inclined whenever, in comparison with the approved stability information, a deviation from the lightweight displacement exceeding 2% or a deviation of the longitudinal centre of gravity exceeding 1% of L is found or anticipated.

  2.14.2 A report of each inclining or lightweight survey carried out in accordance with 2.7.1 and of the calculation therefrom of the lightweight condition particulars should be submitted to the Administration for approval, together with a copy for their retention. The approved report should be placed on board the craft by the owner in the custody of the master and should incorporate such additions and amendments as the Administration may in any particular case require. The amended lightweight condition particulars so obtained from time to time should be used by the master in substitution for such previously approved particulars when calculating the craft's stability.

  2.14.3 Following any inclining or lightweight survey the master should be supplied with amended stability information if the Administration so requires. The information so supplied should be submitted to the Administration for approval, together with a copy thereof for their retention and should incorporate such additions and amendments as the Administration may in any particular case require.