CHAPTER 3 GENERAL ARRANGEMENT

3100. Safety Deck

A safety deck is to be fitted at such a height below the top deck that when all tanks below the safety deck are flooded but with no load on the keel blocks, there is a reasonable freeboard from the top deck to the waterline. Alternative arrangements to fitting a safety deck, such as the provi- sion of an air cushion, will be given special consideration. Special consideration will also be given to the need for a safety deck in relation to the depth of water in which the deck operates.

3200. Top Deck

The dock is to be provided with a weathertight top deck, weathertight in this case meaning the ability to exclude water other than that due to rainfall in way of necessary access openings.

3300. Ventilation and Access

All tanks are to have vent or overflow pipes that terminate well above the water line at the max- imum draught when the dock is submerged. All compartments are to be provided with manholes

for access and openings are to of the structure.

be arranged to provided adequate ventilation and access to all parts

3400. Cofferdam Compartments

water.

carrying oil are to be separated by cofferdams from those carrying fresh or feed