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 TM 55-1905-223-SDC
Section III. STABILITY CHARACTERISTICS
5-7.
CHARACTERISTICS
a. Initial stability. This term refers to the tendency of the ship to right itself when heeled or inclined to
a small angle, under 7, for example. Initial stability is measured by metacentric height (GM) which is
explained in paragraph 5-4.
b. Range of stability. This term refers to the angles of heel through which the ship maintains a positive
righting arm. See paragraph 5-3 for explanation of the righting arm.
c. Maximum righting arm. This characteristic can be an indicator to the ship's personnel of a
hazardous condition in heavy seas. If the ship rolls beyond the angle of the maximum right arm, it is prudent
to change course to lessen the roll. Also refer back to paragraph 5-3.
d. Angle of list at which maximum righting arm occurs. See paragraph 5-5.
e. Dynamic stability. This characteristic is explained in paragraph 5-6.
Section IV. DAMAGE RESISTANCE CHARACTERISTICS OF THE LCU
DAMAGE RESISTANCE FEATURES. The damage resistance features of this ship are:
5-8.
a. Strength.
b. Watertight integrity.
c. Stability.
d. Proper displacement.
e. Proper distribution of liquids.
f. Optimum material and personnel readiness.
The maintenance of these features before accidental or battle damage is as important for ultimate survival as
damage control measures after the damage is sustained.
In spite of the inherent resistance of ships and in spite of all precautions that can be made before damage,
the survival of the ship will often depend upon prompt and correct control measures after damage. It is
necessary, therefore, to train the entire ship's crew for any eventuality.
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