Toilets In Motion — Ship Toilets

Why is a Ship's Toilet Called a "Head"? A toilet on a ship is called a "head", for reasons that go back to the days of sail. With nothing but wind power, a sailing vessel cannot travel directly into the wind. The one location that is always downwind is the head or bow end.

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Yarr, that be the "front" to ye land-dwellers.

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To go to the head of a ship meant to go to the area where the toilet is located. The wind, as perceived on the vessel itself, would always blow along the deck, appearing to come from behind or possibly across the deck if sailing at an angle to the wind. This would carry most of the odor away. Originally there were just some rails around the base of the bowsprit that the sailor could lean against or sit on, hanging out over the water passing under the bow. By the early 19th century these rails had evolved to a plank seat with holes, a little more comfortable but still pretty crude. Now, with various forms of engine power plus holding tanks and manual or powered pumps, the "head" can be anywhere. But the name stuck. Marine toilets on smaller vessels must be designed differently, because the ship may be rocking from side to side, front to back, or both. Traditional toilets would spill water from the bowl. Marine toilets for smaller vessels are designed so the bowl is kept dry until it is used, then water is pumped into the bowl for cleaning and immediately pumped out. For an example, see the French canal boats below. Let's look at some heads, the toilets on board Greek, Egyptian, American, and Scottish ferries, and on French canal boats. Plus, we'll see the toilet from Hitler's yacht.

French Canal Cruiser Here is one of the heads and the flushing mechanism on board a rented Crusader canal boat in France. The entire small compartment is used as a shower. The deck level within the head compartment is slightly lower, so shower water doesn't go out into the passageway. So, you need to get the toilet paper roll, barely visible above, to dry safety before starting a shower! There's a small counter with a sink to your right as you face the toilet. Below is a close-up of the T-handle used to manually pump out the Crusader head into the holding tank. Below is the head on a very similar an Orion class rented canal boat in France. The Crusader was derived from the earlier Orion design. The only differences I noticed between the two boat designs were: A bow thruster was added to the Crusader design. The main helm position is designed a little differently. The domestic water supply is designed differently, with multiple much smaller pressure tanks on the earlier Orion versus a single much larger pressure tank on the Crusader. The simpler toilets on the earlier Orion worked much better. The Orion toilets are operated by pressing a waterproofed button on the panel below the counter to pump water into the bowl, and stepping on a foot pedal (barely visible to the right of the toilet base) to open the large flapper valve into the holding tank. For much better performance, use the detachable shower spray nozzle. Again, the entire head compartment is the shower, see the second picture below with the drain in the floor. The Crusader heads had a complicated and poorly performing T-handle pumping mechanism. Canal du Midi Canal Latéral

à la Loire I have taken these canal boats on trips on the Canal Latéral à la Loire between Briare and Decize, and on the Canal du Midi between Port Cassafieres and Castelnaudary. Larger vessels which are more stable can use toilets which are a little more like the land-based ones we are familiar with. But not exactly the same! They are generally kept dry or at least with very little water in them routinely. If the vessels are only operated in relatively calm conditions, like the New York harbor ferries shown below, then the toilets can be more or less standard land units.

Staten Island Ferry, New York The Staten Island Ferry, seen above, provides free rides from the lower tip of Manhattan (New York, USA), past the Statue of Liberty and Ellis Island, to Staten Island, and back. If you need to go before you board, the first picture shows an all-stainless-steel model in the Manhattan terminal. The second is one of the heads on board the ferry itself. Some of the fixtures on board are ceramic, others are all sstaten-island-ferry-20190302-125219.jpgtainless steel. New York Water Taxi The New York Water Taxi, seen above, is a smaller ferry crossing the East River between lower Manhattan and Brooklyn, Here is its on-board toilet. It looks like they flush with grey water. I have already flushed it. So far, this is about raised commodes. If you have a squat toilet, like the Egyptian ferry shown below, there is no bowl to hold water. What would be very important in that case would be either a one-way valve or one or more goosenecks adequately shaped, sized, and oriented to prevent stored liquid from re-entering the toilet from the storage tank.

Egyptian Ferry This toilet is on an Egyptian ferry on Nuweiba-Aqaba route between the Sinai and Jordan. It has no sprayer, but at least there's a hose. This is actually pretty nice by Egyptian public toilet standards. And I must emphasize that it's rust you see there! This is from a trip from Cairo to İstanbul through Egypt, Jordan, Syria and Turkey. The toilet itself is just one component of what U.S. regulations call the MSD or Marine Sanitation Device. The important details are in the holding tank and whatever processing is done before the waste is pumped overboard, possibly discharged out into the water. If the waste isn't pumped overboard, it is stored in the holding tank until the boat returns to the dock and the holding tank is pumped ashore for treatment. The MSDs are classified as Type I, Type II, and Type III. A Type I MSD must totally liquefy solids and paper, while reducing the bacteria count to less than 1,000 per 100 milliliters. It's a liquid, but it's very dirty. A Type II MSD must reduce the bacteria count to less than 200 per 100 milliliters, and also have less than 1,000 particles of suspended particulate matter per 100 milliliters. The resulting liquid is almost completely clear, although still colored. Types I and II would then discharge the resulting liquid out into the surrounding water, pumping it out through an opening called a seacock. A Type III MSD is a holding tank. Unlike the Types I and II, a Type III does not discharge any liquid into the water. It holds all waste until it can be pumped ashore for treatment. Vessels up through 65 feet in length may use any of these three types. Vessels larger than 65 feet must use either a Type II or Type III. In other words, a larger vessel, with more people on board and thus more sewage, and with a larger overall budget, must get its waste much cleaner before pumping it overboard. Smaller vessels, with fewer people and less waste, are allowed to be much dirtier but at their smaller scale. A Type II MSD much larger, expensive, and power-hungry than a Type I, and so Type II MSDs are usually found only on larger vessels. A Type III MSD can be quite simple, and is likely the best choice as long it can be large enough for the planned time away from a pump-out facility. So, if you're going to be away from the dock for a long time on a large vessel, you will need the expensive Type II. You will be at sea too long to keep it all in a holding tank, but it's a larger class of vessel with more people on board and so you must discharge cleaner material. Of course, if you can afford to buy a large yacht and go on extended trips, the addition cost of a Type II MSD is just a relatively small part. On today's yachts you would see high tech, lavish restrooms. If you were to look at Hatteras yachts for sale you would be amazed at the interiors of their bathrooms. The need to make waste pumpable (Type I) and fully liquified (Type II) is why it's important that you put nothing down a marine toilet except human waste and special marine-use toilet paper. That toilet paper breaks down completely. A macerator is an electrically driven device that liquifies the waste, much like a kitchen blender. You can probably see why there is a distinction between septic waste and grey water. Septic waste from the toilets only, handled by the MSD, versus grey water from showers and sinks. You don't want to macerate or store any more than you have to. However, in some areas such as the Great Lakes between the U.S. and Canada, you have to hold grey water on board.

Greek Ferry Travel by

Greek Ferry The larger Greek ferries have multiple passenger decks above vehicle decks sized to carry trucks. This scenic head is on board the F/B Artemis Greek ferry en route from Ios to Santorini in the Aegean. It's not in the bow, it's looking out to the side from one of the upper decks. The Artemis is the smallest conventional ferry of the Hellenic Seaways line. 89.9 meters long, 14 meter beam, carrying up to 1,250 passengers and 74 cars at a speed of 18 knots. That sounds large to me, but the same company operates the Nissos Mykonos and Nissos Chios at nine times the gross tonnage each, 141 meters long, 21 meter beam, and 1,915 passengers and 418 cars, running at 28 knots. The conventional ferries are great ways to travel between Greek islands. They have large open decks and great views. The high-speed ferries get you there faster but you can't see as much along the way. Even the conventional ones make fast port stops. They drop the rear ramp, drive any cars and trucks off and on, and load passengers off and on. Some have a single wide ramp and passengers wait for the vehicles or vice-versa, others have a second narrow ramp just for passengers. And, of course, at small islands there may be no vehicles getting on or off. In those cases the ramp may only be on the pier for seven minutes or less. Be on time, don't miss your boat!

Orkney Island Ferry The M/V Hamnavoe, seen above, links the Orkney Islands with the north coast of Scotland. There are several sailings a day, 90 minutes en route each direction. Here are the heads.

Inner Hebrides Island Ferry The M/V Isle of Mull, shown above, is one of the many ferries connecting the Inner Hebrides islands with the west coast of Scotland. Here is one of its heads as photographed during a trip from Oban to Craignure on the Isle of Mull.