This Kingston valve then is left open until time to surface comes.

In general, main ballast tanks have the Kingston valve atop the tank.

The Kingston valve associated with each ballast tank can be operated manually.

This pressure is released when the vents are opened for diving, allowing the water to enter through the open Kingston valves.

Normally, the tank is flooded when the Kingston valve is opened, usually hydraulically from the control room.

This Kingston valve, controllable both manually and hydraulically, is known by some as main vent operating gear.

In earlier times, the openings at the bottom of the ballast tank were fitted with valves known as Kingston valves.

A Kingston valve is a type of valve fitted in the bottom of a ship's fuel, water and ballast tanks.

On submarines Kingston valves are fitted at the bottom of the submarine's ballast tanks in order to admit water when the submarine dives.

Others believe that the bypassing of an unreliable magnetic reducer closed a Kingston valve in the forward ballast tank resulting in a delay.

One Kingston valve serves a pair, but each tank has a vent riser, with air connections and stop valves in the vent riser.

The tank is capped by a vent riser, a pipe coming out of the top of the tank that terminates at a Kingston valve.

Kingston valves are sometimes used to scuttle or sink a ship, as was done for example, to the German aircraft carrier Graf Zeppelin.

Before the crew disembarked, Matushenko ordered that the ship's Kingston valves be opened so Potemkin would sink to the bottom of the harbor.

When surfacing, the Kingston valve gets shut so the introduced air gets trapped in the tank and pushes the water out the tank's bottom through the flood port.

The explosives were triggered on the 8th, but they failed, so a contingent was sent aboard Tosa on the 9th; they opened six Kingston valves in the engine room at about 01:25.

When Red Army forces neared the city in April 1945, the ship's Kingston valves were opened, flooding her lower spaces and settling her firmly into the mud in shallow water.

The Kingston valves linking the ballast tanks to the sea could be left open, a practice known as "riding the valves", and the water level in the tanks controlled solely by the vent and blowing air valves.