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On a ship, the function of a porthole, when open, is to permit light and fresh air to enter the dark and often damp below-deck quarters of the vessel. It also affords below-deck occupants a limited view to the outside world. [2] When closed, the porthole provides a strong water-tight, weather-tight and sometimes light-tight barrier.
A closed weathertight door can seal out spray and periodic minor flow over weather decks, but may leak during immersion. These outward opening doors are useful at weather deck entrances to compartments above the main deck. [11] Joiner doors are similar to doors used in conventional buildings ashore. They afford privacy and temperature control ...
A place of refuge for ships is a safe harbor or other secure place where a ship in distress can safely be taken to "prevent further damage or deterioration of the ship". [ 1 ] It is often claimed that under international maritime law , "no port may be closed to a foreign ship seeking shelter from storm or bad weather or otherwise compelled to ...
The procedure of entering an airlock from the external or ambient pressure environment, sealing it, equalizing the pressure, and passing through the inner door is known as locking in. Conversely, locking out involves equalizing pressure, unsealing the outer door, then exiting the lock compartment to enter the ambient environment.
It is typically found below the weather deck in the stern of the vessel and is accessed through a cargo hatch (if accessed from the main deck) or a doorway (if accessed from below decks). The equipment usually stored in a lazarette would be spare lines, sails, sail repair, line and cable splicing repair equipment, fenders, bosun chair , spare ...
Also ship's magazine. The ammunition storage area aboard a warship. magnetic bearing An absolute bearing using magnetic north. magnetic north The direction towards the North Magnetic Pole. Varies slowly over time. maiden voyage The first voyage of a ship in its intended role, i.e. excluding trial trips. Maierform bow A V-shaped bow introduced in the late 1920s which allowed a ship to maintain ...
An anchorage is a location at sea where ships can lower anchors. Anchorages are where anchors are lowered and utilised, whereas moorings usually are tethering to buoys or something similar. The locations usually have conditions for safe anchorage in protection from weather conditions, and other hazards.
A bow visor is a feature of some ships, in particular ferries and roll-on/roll-off ships, that allows the bow to articulate up and down, providing access to the cargo ramp and storage deck near the water line. [1] However, in modern ferry design over the last 45 years, bow visors have given way to clam doors. Instead of one large visor, two ...
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