1 Icing allowances
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Statutory Documents - IMO Publications and Documents - International Codes - HSC Code - International Code of Safety for High Speed Craft, 1994 – Resolution MSC.36(63) - Annex - International Code of Safety for High Speed Craft, 1994 - Annex 5 - Ice Accretion Applicable to all Types of Craft - 1 Icing allowances

1 Icing allowances

  1.1 For craft operating in areas where ice accretion is likely to occur the following icing allowance should be made in the stability calculations:

  • .1 30 kg/m2 on exposed weather decks and gangways;

  • .2 7.5 kg/m2 for projected lateral area of each side of the craft above the waterplane;

  • .3 the projected lateral area of discontinuous surfaces of rail, sundry booms, spars (except masts) and rigging and the projected lateral area of other small objects should be computed by increasing the total projected area of continuous surfaces by 5% and the static moments of this area by 10%;

  • .4 reduction of stability due to asymmetric ice accumulations in cross-structure.

  1.2 For craft operating in areas where ice accretion may be expected:

  • .1 Within the areas defined in 2.1, 2.3, 2.4 and 2.5 known to have icing conditions significantly different from those in 1.1, ice accretion requirements of one half to twice the required allowance may be applied.

  • .2 Within the area defined in 2.2, where ice accretion in excess of twice the allowance required by 1.1 may be expected, more severe requirements than those given in 1.1 may be applied.

  1.3 Information should be provided in respect of the assumptions made in calculating the condition of the craft in each of the circumstances set out in this annex for the following:

  • .1 duration of the voyage in terms of the period spent in reaching the destination and returning to port; and

  • .2 consumption rates during the voyage for fuel, water, stores and other consumables.

Parent topic: Annex 5 - Ice Accretion Applicable to all Types of Craft
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