A hole or opening used for the removal of water from an enclosed volume or surface to avoid flooding of the volume and/or corrosion of the metal surface.

A pipe used for drainage.

Uncontrolled moving of an anchor over the sea bottom because it no longer prevents the movement of the vessel.

The drag force acting on a particular body moving relative to a fluid within which it is immersed.

Resistance (force) caused by friction in the direction opposite to the motion of the centre of gravity of a moving body in a fluid.

Draft surveys are used to determine the weight of bulk cargo such as iron ore, coal, steel scrap, grain and some specific quantities of liquid cargo loaded onto, or discharged from, a vessel.

A nonstandard term for flat welding position.

A small piece of plate attached to a larger area of plate that requires strengthening in that location. Usually at the attachment point of a stiffener. Also, a flat plate welded to a plated structure that has suffered damage.

Hatch cover panel in which both top and bottom surfaces are plated-in.

According to Ferry Technology, December 2007/January 2008 Towards the end of 2007 the first of three new Coastal-class double-enders left Flensburger Schiffbau-Gesellschaft for British Columbia in Canada.

According to the Ferry Technology October 2005 In 2005 the Polish shipyard Remontowa SA delivered a 116m double-ended ferry BASTØ III to the Norwegian owner, Bastø Fosen.

Two innovative 106,000 dwt crude carriers TEMPERA and MASTERA were built by the Yokosuka shipyard of Sumitomo Heavy Industries Ltd. for the Finnish group Fortum Oil...

An important new stage in the advance of the Finnish double-acting concept has been reached with the handover by Aker Finnyards to the Russian Far Eastern Shipping Co of the combined icebreaker/offshore supply/support ship FESCO SAKHALIN.

The shell plating with stiffeners below the top of the inner bottom and other elements below and including the inner bottom plating.

Compartments at the bottom of a ship between the inner bottom and the shell plating. SOLAS 2009 specifies in detail requirements for fitting a double bottom...

During winter tests of the Artic tanker UIKKU, it was found that a ship with an Azipod and well designed stern generally performs much better in heavy ice condition when going astern.

A new concept of artic transport based on the principle of a barge being pushed by a dedicated pusher tug in open water and pulled through the ice by specially designed icebreaking tug.

Doors should generally open outwards to provide additional security against the impact of the sea. See also Bow doors, Flood control doors.

Water that may be used for drinking or cooking.

DOCKWISE VANGUARD is a semi-submersible vessel for heavy transport and offshore dry-docking built by Hyundai Heavy Industries in Ulsan for the Dutch shipping company Dockwise.