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Appendix I, Continued
BINNACLE.—The stand in which a
compass is mounted.
BLAST.—Signal on a ship’s whistle; short,
about 1 second; prolonged, 4 to 6 seconds.
BLINKING.—Regular shifting right and
left of a loran signal to indicate that the
signals are out of synchronization.
BROAD COMMAND
PENNANT.—Personal command pennant
of an officer, not a flag officer.
BUOY.—A floating object, other than a
lightship, moored or anchored to the
bottom as an aid to navigation.
CELESTIAL EQUATOR.—The
intersection of the celestial sphere and
extended plane of the equator.
CELESTIAL NAVIGATION.—Navigation
with the aid of celestial bodies.
CELESTIAL SPHERE.—An imaginary
sphere of infinite radius concentric with
Earth on which all celestial bodies except
Earth are imagined to be provided.
CELSIUS.—Temperature based upon a
scale in which, under standard atmospheric
pressure, water freezes at 0° and boils at
100°.
CHART.—A map intended primarily for
navigational use.
CHRONOMETER.—A timepiece with a
nearly constant rate.
CIRROCUMULUS—High clouds (mean
lower level above 20,000 feet), composed
of small white flakes or of very small
globular masses.
CIRROSTRATUS.—Thin, whitish, high
clouds (mean lower level above 20,000
feet).
CIRRUS.—Detached high clouds (mean
lower level above 20,000 feet) of delicate
and fibrous appearance.
CLOSE ABOARD.—Near; within 600
yards for ship, 400 yards for boat.
CLOSEST POINT OF APPROACH.—The
position of a contact when it reaches its
minimum range to own ship.
CLOSE UP.-A flag that is all the way up
on its halyard.
CLOUD.—A visible assemblage of
numerous tiny droplets of water or ice
crystals formed by condensation of water
vapor in the air with the base above the
surface of Earth.
COAST PILOT.—A descriptive book for
the use of mariners, containing detailed
information about coastal waters, harbor
facilities, and so forth, of an area,
particularly along the coasts of the United
States.
COLORS.—The national flag. The
ceremony of raising the flag at 0800 and
lowering it at sunset aboard a ship not
under way or at a shore station.
AI-2
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