sels in the Royal Navy. It stops the can be pumped out when afloat. The extra buoyancy is ob- way of the ship at slow speeds, and is uncertain in its action shipped is discharged through tubes into the sea bejow. tained entirely by means of air cases. When the lee gun- when the vessel is under… … derable hight above the water; it is then floating on two when seen fi'.ted to the vessel; and the ease with GUMPEL'S RUDDER. points, with the ballast far above the center of buoyancy, which it could be worked, although the steering thus forming an unstable equilibrium. In this position the boats,…
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