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it actually is to one side, valuable time can be lost while
the OOD tries to spot it. But if you say, “Periscope
bearing Tree Fife Ze-ro,” the OOD will have no
difficulty determining in which direction to look. Note
that the word “relative” was not included in our
sample report. It is understood that lookouts report
only relative bearings.
Position Angle
Position angle is the angle, measured in degrees,
between the line of sight to the horizon and the line
of sight to the detected aircraft. The OOD does not
have time to search from the horizon (0°) to the zenith
(directly overhead—90°) for a contact reported without
a given position angle. A position angle will quickly
locate the target for the OOD and the antiaircraft gun
directors.
Position angles should be given on all aircraft in
one or two digits and spoken as a whole, not digit by
digit. The reference “position angle” is always spoken
before the numerals.
Position Angle
Spoken
0 . . . . . . . . . . . . . . Position angle Ze-ro
5 . . . . . . . . . . . . . . Position angle Fife
15 . . . . . . . . . . . . . .
Position angle Fifteen
27 . . . . . . . . . . . . . . Position angle Twenty Sev-en
85 . . . . . . . . . . . . . .
Position angle Eighty Fife
90 . . . . . . . . . . . . . . Position angle Ninety
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