MIL-HDBK-1025/5
Hurricane. Intense tropical cyclone in which winds spiral inward toward a low
pressure core with maximum surface wind velocities that equal or exceed 80 mph
(70 knots) for several minutes or longer at some points.
Jetty. On open seacoasts, a structure extending into a body of water, and
designed to prevent shoaling of a channel by littoral processes, and to direct
and confine the stream or tidal flow. Jetties are built at the mouth of a
river or tidal inlet to help maintain and stabilize a channel.
Keel. The principal bottom structural element of a craft extending along the
centerline for the full length of the craft.
(1) The part or side sheltered or turned away from wind or waves,
Lee.
(2) The quarter or region toward which the wind blows (chiefly
nautical).
Leeward. The direction toward which the wind is blowing; the direction toward
which waves are traveling.
Littoral Drift. The sedimentary material moved in the littoral zone under the
action of waves and currents.
Littoral Transport. The movement of littoral drift in the littoral zone by
waves and currents. It includes movement parallel (long-shore transport) and
perpendicular (on-shore transport) to the shore.
Operational Launching. Boat launching on a routine in-and-out basis as
distinguished from initial or seasonal launching.
Overtopping. Flow of water over the top of a structure, such as a breakwater,
as a result of wave runup or surge action.
Pier.
A dock that is built from the shore out into the harbor and used for
berthing and mooring craft (a structure, usually, of open construction).
Profile. Beach. The intersection of the ground surface with a vertical plane;
may extend from the top of the dune line to the seaward limit of sand
movement.
Pump out Station. A facility for removal of sanitary wastes from a boat's
holding tank or head.
Revetment. A facing of stone, concrete, or other material built to protect a
scarp, embankment, or shore structure against erosion by wave action or
currents.
Riprap. A layer, facing, or protective mound of stones randomly placed to
prevent erosion, scour, or sloughing of structure or embankment; also the
stone so used.
Riser. A vertical pipe, post, or support extending above deck level to
support utility outlets and other facilities.
83
Previous Page
