A furnace grate that moves fuel through the combustion chamber

A large net with its mouth held open, towed by a trawler along the bottom to catch bottom fish.

A winch having one or more drums, which may operate independently or simultaneously, to hold、haul in or veer out the trawl ropes. It may have monitoring safety devices and spooling gear to protect ropes、net and gear. Auxiliary drums and warping ends may b ...

A fishing vessel designed to tow a trawl for catching bottom fish.

Heavy-duty wire used to lower heavy instruments overboard from the trawl winch.

Transportation Research Board

Type Rating Certificate

In wooden ship construction, these were cylindrical pins of oak which were used to secure the planks to her timbers. Pronounced "trennels".

An architectural feature used to shade exterior walls; usually made of a lattice of metal or wood; often covered by vines to provide additional summertime shading.

Two short pieces of timber fixed horizontally fore and aft on each side of the lower masthead of a square rigged vessel and used to support the topmast, the lower crosstrees, and the top.

Telecommunication Relay Float.

A stay leading from one mast, such as the main mast to another, such as the mizzen mast.

See principal stress (normal).

To lash up.

A line used for suspending articles.

The time allotted to a man to stand at the helm.

A spell of duty connected with the navigation of a vessel; more particularly, at the wheel or look-out.

The period of time during which the wheelsman remains at the wheel.

A type of solar thermal collector in which a heat transfer fluid drips out of header pipe at the top of the collector, runs down the collector absorber and into a tray at the bottom where it drains to a storage tank.

A running light allowed on some sailboats instead of the normal bow and stern lights. The tricolor light contains the red and green side lights and the white stern light in a single fitting that is attached to the top of the mast.