Surface units
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - International Codes - 1989 MODU Code – Code for the Construction and Equipment of Mobile Offshore Drilling Units, 1989 – Resolution A.649(16) - Chapter 3 – Subdivision, Stability and Freeboard - 3.5 Extent of damage - Surface units

Surface units

  3.5.1 In assessing the damage stability of surface units, the following extent of damage should be assumed to occur between effective watertight bulkheads:

  • .1 horizontal penetration: 1.5 m; and

  • .2 vertical extent: from the base line upwards without limit.

  3.5.2 The distance between effective watertight bulkheads or their nearest stepped portions which are positioned within the assumed extent of horizontal penetration should be not less than 3.0 m; where there is a lesser distance, one or more of the adjacent bulkheads should be disregarded.

  3.5.3 Where damage of a lesser extent than in 3.5.1 results in a more severe condition, such lesser extent should be assumed.

  3.5.4 All piping, ventilation systems, trunks, etc. within the extent of damage referred to in 3.5.1 should be assumed to be damaged. Positive means of closure should be provided at watertight boundaries to preclude the progressive flooding of other spaces which are intended to be intact.

Parent topic: 3.5 Extent of damage
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