Deadlight

deadlight - Fixed ports that do not open, placed in the deck or cabin to admit light.

deadlight - A non-opening port or skylight; a small porthole in a cabin top or deck; a cover clamped over a porthole to protect it in heavy weather; a fixed light set into the deck or cabin roof to provide light below.

Deadlight:
(1) Eyes. "Use yer deadlights, matey!"
(2) Fixed ports that do not open which are placed in the deck or cabin to admit light.

Deadlights
Wood or metal coverings over port-holes or windows; also used in bad weather to prevent the sea smashing the glass
Derelict ...

Deadlight - Either a cover clamped over a porthole to protect it in heavy weather or a fixed light set into the deck or cabin roof to provide light below.

DEADLIGHT A applied to a port lid or cover; a metal shutter fitted to protect the glass in a fixed or port light. Often incorrectly applied to a fixed light in a deck, bulkhead or shell.

wind is directly behind, or astern, of the boat and the mainsail and boom are all the way out at right angles to the mast deadeye A round, flat wooden block with three holes but no sheaves, through which shroud lanyards are received deadlight ...

Deadlight: Fixed light in a cabin's roof.
Deck: Solid covering over a hull, does not always cover all of it
Depression: Low-pressure area in meteorology ...

See also: Bow, Deck, Compass, Open, High