A deckhead is the underside of a
deck in a
ship
A ship is a large watercraft that travels the world's oceans and other sufficiently deep waterways, carrying cargo or passengers, or in support of specialized missions, such as defense, research, and fishing. Ships are generally distinguished ...
. It bears the same relationship to a
compartment
Compartment may refer to:
Biology
* Compartment (anatomy), a space of connective tissue between muscles
* Compartment (chemistry), in which different parts of the same protein serves different functions
* Compartment (development), fields of cells ...
on the deck below as does the ceiling to the room of a
house.
References
{{water-transport-stub
Nautical terminology