Berth (sleeping)

A berth is a bed or sleeping accommodation on vehicles. Space accommodations have contributed to certain common design elements of berths.

While beds on large ships are little different from those on shore, the lack of space on smaller yachts means that bunks must be fit in wherever possible. Some of these berths have specific names:

Lee cloths are sheets of canvas or other fabric attached to the open side of the bunk (very few are open all round) and usually tucked under the mattress during the day or when sleeping in harbour. The lee cloth keeps the sleeping person in the bunk from falling out when the boat heels during sailing or rough weather.

Long-distance trains running at night usually have sleeping compartments with sleeping berths. In the case of compartments with two berths, one is on top of the other in a double-bunk arrangement. These beds (the lower bed in a double-bunk arrangement) are usually designed in conjunction with seats which occupy the same space, and each can be folded away when the other is in use.

Sleeper trains are very common in Europe. There are nightly sleeper trains in most countries. Sleeper trains usually consist of single or double-berth compartments as well as couchettes which have 4 or 6 beds (a bottom, middle and top bunk on each side of the compartment).

Long-haul truckers sleep in berths contained within their trucks. The sleeper-berth's size and location is typically regulated.

...
Wikipedia