One of the armored projections fitted with gun ports, used on modern war vessels.

the pontoon-like portion of the hull that provides hydrodynamic lift; in the three-point configuration common to current unlimited racing craft, one sponson is forward on each side of the main hull.

On each side of the hull toward the bow, the members that resemble pontoons and on which the boat rides.

an addition to the side of a vessel that is outside its normal hull and which provides added deck space and/or greater flotation stability.

The part of a gun platform which partially projects over the side of a ship. Used to increase the arc-of-fire of a gun position, especially toward the front or rear of a vessel.

Any of a variety of flat structures that project outward from the side of a boat or ship, often a platform for armaments on larger vessels and used for stability on smaller boats and watercraft.

A pontoon-like hull, or portion of a hull, that provides lift. A three-point hydroplane has two sponsons, one each side of the main hull.

Sponsons are projections from the sides of a watercraft, for protection, stability, or the mounting of equipment such as armaments or lifeboats, etc. They extend a hull dimension at or below the waterline and serve to increase floatation or add lift when underway.