Page 176 - NAVAL SCIENCE 3 TEXTBOOK

II Small Boat Seamanship

At some time or another during unit visits to naval bases and ships The Hull and Its Parts
or in recreational ilClivilies, YOli will be concerned with small boat
The hull is the largest part of a boat and is the structure that
St'<1manship. Tn this chapter we will discuss the particular charac-
floats in the water. There are two basic hull designs:
teristics of small boats, incilidilig nomencinturc (vocabulary), boat
h;:lIldling. <lnd boat etiquette, Most of our disclission of boat han- the displacemellt type, which plows through the water
dling will be concerned with powerboats. as opposed to sailboats, the planing type, which skims 0 11 the surface
because that is the type of boat with which most NjROTC cadets
will come into conlact during their training. Deck
Bow
Stern /
L--..-----J--_
Boat Nomenclature

The first thing that nIl}'one who will be in or .lround a small boat Transom
needs to know is the nomenclature that applies to it. There are two
basic lUnds of small boats with which we will be concerned: pow- Keel
erboats ilnd sailboats. A powervoat is any vessel that is propelled
A drawing of a small boat hull, showing the principal parts.
through the water by some type of motor or engine. A snilvoat is
<., vessel that is propelled mainly by the wind, through the use of 1\·lost sailboats and man}' powerboats have displacement
some type of sail. Some boats, called lI1oto"~5a;le,.s, are designed to hulls, while high-speed powerboats usuall), hal'e planing hulls.
be propelled by both power and sail at the same time, but under Rut regardless of the type of hulL the basic nomenclature lIsed to
the rules of the rond, and fo r purposes of our disclission, they are describe them is the same for both sailboats and pO\\'('rboats.
considered power-drivcn v('ssels. Like a ship, the pointed forward portion of the hull is called
the VOIv, ~lJld the opposite rear portion is the stem. The extreme
back end of the stern, lIsually t~lirly tlat in a powerboat, is called
the tmllSOIll. At the bottom of the hull is the keel. The keel is usu-
ally fairly dcep in a sailboat and relatively shallo\\' in a powcrboat.
0" the top of the hull is the rieck. The depth to which the hull sinks
in the water is the dmft of the huU, <md its maximulll width is the
veall/. The line the water makes with the hull is the water/iI/C.
lioats tl1<1t have two t:lirly shallo",~dri.lft V-shaped hulls con-
nected together by the boat's upperworks are called mtnJlWIWIS,
and those having three such hulls are trimaralls.

Upperworks
Structures placed on the hull, corresponding to the superstructure
of <l ship, ,He called ((IViIIS. Vertic.ll openings in the cabin are called
doors. and horizontal openings in the cabin and de(k are hatches.
A powerboat, like this captain's gig being made ready alongside the \Vindows, particularly in a sailboat, are called ports, The forw;:ud
USS BoxedLH D#4), is any vessel propelied by some type of motor
window or sets of windows in a powerboat are the willnshield.
or engine.
Larger bonts havc it kitchen, or galley, and one or more bath~
rooms, ctllled heads. Separate bedrooms on il boat arc called st(/fe~
I"OO/I/S.

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