Vulnerabilities -

tightly closed the opening in the boar d a vessel, also called the hatch. It is designed primarily to tr ansport cargo, but can also serve as an opening of communication (backup, emergency), and can be used as vents. Gaps are closed sh utters or lids, and if they are fitted with windows, this gap also fulfill the function of doświetlającą inside the unit. On yachts and other small craft may be a gap not only on the surface of the deck, but also on the roof deckhouses, or low superstructure.