Hong Kong Regulations

MERCHANT SHIPPING (INSTRUCTIONS TO SURVEYORS) (PASSENGER SHIPS) REGULATIONS - REGULATION 55

Permeability

(Addition to paragraph 9(3)). Where it is shown to the satisfaction of the
Principal Surveyor of Ships that the permeability of one or more compartments
of the portion of the ship before (or abaft) the machinery space, as
determined by detailed calculation, is less than that given by the formula 63
+ 35 a/v, the calculated values may be substituted for each of the
compartments in that portion of the ship. For the purpose of such calculation
the permeabilities of passenger spaces, as defined in paragraph 6(12), shall
be taken as 95, that of all cargo, coal and store spaces as 60, and that of
double bottom, oil fuel and other tanks at such values as may be approved in
each case by the Principal Surveyor of Ships.