SEA CHEST COVER TYPE

As a Hull Aperture Blanks installed to the Sea Chest Grid part of ship, it is the type in which gasket is perfectly sealed by the difference of air pressure if fixing 2 Tee-bolts to grid, placing gasket to outboard hull and emitting sea water to sea chest. HULL APERTURE BLANK required to the GRID part of ship will be designed, manufactured considering that its size and curvature should be more than 2 times higher value than safety factor by using extreme draft data based on the floor plan of ship.