Module 1 - Nautical Terms
Below Decks
What you will learn
Use common accommodation and system-location terms to report a fault or direct a crew member below decks without ambiguity.
Below-deck vocabulary is more than a cabin tour: it lets the crew locate water, smoke, fuel, controls and people quickly when visibility or time is limited.
The saloon is the main accommodation or living area; the galley is the cooking area; the heads contains toilet or washroom facilities; and a berth is a sleeping place. A forecabin is forward, while a quarter berth or aft cabin is towards the stern. Actual layouts vary considerably.
The chart table or navigation station may hold charts, publications, instruments or communications equipment, but equipment can be distributed elsewhere. The companionway is the access between deck and the accommodation; it may also be a route for water, smoke and people, so keeping it usable can matter in an incident.
A Coastal-level report should include the side, fore-and-aft location and compartment or system: for example, 'water entering the port locker below the aft saloon berth'. Do not rely on 'downstairs' or assume a seacock, battery isolator or bilge pump is in the same place as on another boat.
Locate a problem, not just a room
Water is found below a berth. A useful report distinguishes whether it is forward or aft, port or starboard, fresh or salt if known, rising or static, and close to a through-hull, tank or pipework.
1. Name the compartment
Identify the saloon, galley, heads, cabin or locker.
2. Fix the location
Add port or starboard and fore, amidships or aft.
3. Describe the condition
Report what is observed and whether it is changing; avoid guessing the cause as fact.
Sense check: The report should let another person go directly to the location and verify the condition without first finding the speaker.
Common mistake or limitation
- Names such as chart table, heads and quarter berth describe spaces, not guaranteed equipment locations. Verify the actual vessel's systems and shut-offs.
- Do not report an assumed cause as an observation. 'Water rising below the port aft berth' is stronger evidence than 'the seacock has failed' before inspection.
Recap
- Accommodation terms give a shared map of the vessel, but layouts vary.
- Add side and fore-and-aft position to make a below-deck report actionable.
- Separate what you observe from the cause you suspect.
Optional quick check
Section 5 of 9
Which report best helps the skipper direct a response to water found below decks?
Sources and factual review
Reviewed 2 September 2026 - Compass Revision editorial review.
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