5.2 Calculation of outflow in case of side damage
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Statutory Documents - IMO Publications and Documents - Resolutions - Marine Environment Protection Committee - Resolution MEPC.64(36) - Guidelines for Approval of Alternative Structural or Operational Arrangements as Called for in Regulation 13G(7) of Annex I of MARPOL 73/78 - (adopted on 4 November 1994) - Annex - Guidelines for Approval of Alternative Structural or Operational Arrangements as Called for in MARPOL 73/78, Annex I, Regulation 13G(7) - Methodology for calculation of the hypothetical oil outflow - 5.2 Calculation of outflow in case of side damage

5.2 Calculation of outflow in case of side damage

 Calculation of the outflow from a side damage should be done as follows:

Length in metres between the forward and after extremities of the cargo tanks = Lt (m)
Length of tank number i = l i (m)
Distance from hull plating to the tank boundary = s i (m)
Cargo volume in tank number i = V i (m3)
Length of side damage according to subpara 5.1.1. = l c (m)
Transverse extent of damage according to subpara 5.1.1 = t c (m)

  • Even longitudinal distribution of damage location is assumed

    Probability factor for breaching tank number i due to side damage

    Total hypothetical outflow in case of a side damage

 This calculation method gives appropriate credit for any number and size of side ballast tanks. It also takes into account the effect of the cargo tank size. The risk of breaching a longitudinal bulkhead and outflow from centre tanks is also taken into account.

Parent topic: Methodology for calculation of the hypothetical oil outflow
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