MIL-PRF-10436N
3.4.3 Sighting device. The compass shall have a sighting mechanism, capable of aiming the
compass in day and night conditions (see 4.4.1.3).
3.4.4 Bezel. The compass shall have an attached bezel (ring with luminous line), capable of
rotation through 360 degrees in either direction. Rotation shall be limited to 3 degree increments
with tactile (non-audible) feedback. There shall also be means to prevent accidental movement
or removal of the bezel (see 4.4.1.4).
3.4.5 Free floating assembly. When a free floating assembly is employed, the compass shall
incorporate a mechanism that restricts all movement of the dial assembly when the compass is
not in use, and automatically releases the dial assembly for use (see 4.4.1.5).
3.4.6 Lanyard. A neck lanyard 2.5 ±0.5 millimeters (mm) thick with the ends permanently
joined to form a loop, 150 ±5 centimeters (cm) in circumference, shall be attached to each
compass. The lanyard shall be lusterless green (see 6.11) and made from a suitable, pliable,
durable material (see 4.4.1.6).
3.4.6.1 Lanyard attachment. The lanyard and compass attachment point shall withstand a
force of 34 kg without damage, breakage or separation from the compass (see 4.4.1.6.1).
3.4.7 Carrying case. A carrying case shall be furnished with each compass. The case shall be
a pouch made from a suitable, pliable, durable material, with a single heavy duty fastening
system on the fold over flap closure. The carrying case material shall be lusterless green (see
6.11) and the fasteners shall be lusterless black (see 6.11). It shall be provided with a means for
drainage and for attachment to belts 7 cm wide. The case shall be constructed for repeated use
and to facilitate storage and retrieval of the compass and instruction card (see 4.4.1.7 and
4.4.3.4).
3.4.7.1 Instruction card. Instructions in semi-gloss white (see 6.11) lettering shall be printed
on a semi-gloss green (see 6.11) card, 6 x 10 cm nominal size that shall not be damaged by water
or moisture. One card, without being folded, shall be inserted into each compass carrying case
(see 4.4.1.7.1). Additional instruction cards shall be provided as specified (see 6.2). Data,
printed legibly on cards, shall be as follows:
INSTRUCTIONS:
(1) Align luminous line on compass ring with sight lines.
(2) Turn ring counterclockwise by desired number of clicks. Note: Number of clicks =
degrees azimuth divided by 3. Example: 51 degrees azimuth / 3 = 17 clicks
counterclockwise.
(3) Turn compass until north arrow lines up with luminous line on ring.
(4) Sight line now points to azimuth.
3.4.8 Magnetic performance. The compass shall provide magnetic performance as specified
in 3.4.8.1, when operated in accordance with the instructions in 3.4.7.1. It shall be capable of
being read to an accuracy that ensures an error not greater than 40 mils, in any ambient light,
under adverse field conditions (see 4.4.1.8).
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