Head (watercraft)

Short description: Ship's toilet

Error creating thumbnail: Unable to save thumbnail to destinationThe head on the beakhead of the 17th-century warship Vasa. The toilets are the two square box-like structures on either side of the bowsprit. On the starboard side, there are still minor remnants of the original seat.

In sailing vessels, the head is the ship's toilet. The name derives from sailing ships in which the toilet area for the regular sailors was placed at the head or bow of the vessel.

## Design

In sailing ships, the toilet was placed in the bow somewhat above the water line with vents or slots cut near the floor level allowing normal wave action to wash out the facility. Only the captain had a private toilet near his quarters, at the stern of the ship in the quarter gallery.

The plans of 18th-century naval ships do not reveal the construction of toilet facilities when the ships were first built. The Journal of Aaron Thomas aboard HMS Lapwing in the Caribbean Sea in the 1790s records that a canvas tube was attached, presumably by the ship's sailmaker, to a superstructure beside the bowsprit near the figurehead, ending just above the normal waterline.

In many modern boats, the heads look similar to seated flush toilets but use a system of valves and pumps that brings sea water into the toilet and pumps the waste out through the hull (in place of the more normal cistern and plumbing trap) to a drain. In small boats the pump is often hand operated. The cleaning mechanism is easily blocked if too much toilet paper or other fibrous material is put down the pan.

Submarine heads face the problem that at greater depths higher water pressure makes it harder to pump the waste out through the hull. As a result, early systems could be complicated, with the head fitted to the United States Navy S-class submarine being described as almost taking an engineer to operate.[1] Making a mistake resulted in waste or seawater being forcibly expelled back into the hull of the submarine.[1] This caused the loss of Engineering:German submarine U-1206.

The toilet on the World War I British E-class submarine was considered so poor by the captain of HMS E35 that he preferred the crew to wait to relieve themselves until the submarine surfaced at night.[2] As a result, many submarines only used the heads as an extra storage space for provisions.[2]

Aboard sailing ships and during the era when all hands aboard a vessel were men, the heads received most of their use for defecation; for routine urination, however, a pissdale was easier to access and simpler to use.

* Head in British submarine HMS Alliance (c.1945–1973)

* Head in Soviet submarine of the Foxtrot class (c.1957–1983)

* Head in submarine Engineering:USS Growler (mid-1950s)

## References

1. ↑ 1.0 1.1 Jones, David; Peter Nunan (2004). U.S. subs down under Brisbane, 1942-1945. Naval Institute Press. pp. 28–29. ISBN 1-59114-644-5.
2. ↑ 2.0 2.1 Mackay, Richard (2003). Precarious Existence British Submariners in World War One. Periscope Publishing Ltd. p. 88. ISBN 1-904381-17-0.

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Parts of a sailing ship

* Aftercastle
* Afterdeck
* Anchor
* Anchor windlass
* Apparent wind indicator
* Beakhead
* Bilge
* Bilgeboard
* Bitts
* Boom brake
* Bow
* Bowsprit
* Capstan
* Cathead
* Centreboard
* Chains
* Cockpit
* Crow's nest
* Daggerboard
* Deck
* Figurehead
* Forecastle
* Gangway
* Gunwale
* Head
* Hull
* Jackline
* Jibboom
* Keel
* Keel (Canting)
* Kelson
* Leeboard
* Mast
* Orlop deck
* Poop deck
* Porthole
* Prow
* Quarter gallery
* Quarterdeck
* Rudder
* Ship's wheel
* Skeg
* Stem
* Stern
* Sternpost
* Strake
* Taffrail
* Tiller
* Top
* Transom
* Whipstaff
* Winch

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Toilets

Equipment|

* Automatic toilet paper dispenser
* Ballcock
* Bedpan
* Bidet
* Bidet shower
* Brush
* Cistern
* Commode
* Electronic bidet
* Flushometer
* Roll holder
* Seat
* Seat cover
* Self-cleaning toilet seat
* Toilet
* Toilet paper
* Trap (U-bend)

Types|

* Aircraft
* Arborloo
* Blair
* Bucket
* Cathole
* Chemical
* Composting
* Container-based
* Dry
* Dual flush
* Electronic toilet
* Flush
* Freezing
* Head (boat)
* Hudo (Scouting)
* Incinerating
* Intelligent
* Latrine
* Low-flush
* On-board
* Passenger train
* Pay
* Pit
* Pig
* Portable
* Potty
* Public
* Sanisette (self-cleaning)
* Space
* Squat
* Treebog
* Urine-diverting dry
* Vacuum
* Washlet (combined toilet and bidet)

Cultural and policy aspects|

* Accessible
* Adult diaper
* Bathroom privileges
* Honeywagon (vehicle)
* Incontinence pad
* Islamic toilet etiquette
* Istinja
* Latrinalia
* Privatization of public toilets
* Swachh Bharat Mission
* Toilet god
* Toilet humour
* Toilet paper orientation
* Toilet plume
* Toilet-related injuries and deaths
* Toilet Revolution in China
* Toilet training
* Toilet Twinning
* Unisex public
* Vacuum truck

Jobs and activities|

* Manual scavenging
* Sanitation worker
* Slopping out
* Toileting
* Toilet training
* Restroom attendant

Urine-related aspects|

* Female urinal
* Female urination device
* Interactive urinal
* Pissoir
* Pollee
* Sanistand
* Urination
* Urinal
* Urinal (health care)
* Urine collection device
* Urine diversion

Feces-related aspects|

* Anal hygiene
* Defecation
* Defecation postures
* Fecal sludge management
* Flying toilet
* Open defecation
* Scatology

Places|

* Hundertwasser Toilets
* Modern Toilet Restaurant
* National Poo Museum
* Outhouse
* Rest area
* Shit Museum
* Sulabh International Museum of Toilets
* Toilet (room)
* Toilets in Japan

Historical terms|

* Aphedron
* Chamber pot
* Close stool
* Dansker
* Garderobe
* Gong farmer
* Groom of the Stool
* Night soil
* Pail closet
* Privy midden
* Reredorter

See also|

* History of water supply and sanitation
* Sanitation
* Sewage treatment
* World Toilet Day

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