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AN/PMQ-3  HAND-HELD  ANEMOMETER
RAIN GAUGES

Aerographers Mate, Module 01-Surface Weather Observations
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Figure 2-31.—AN/PMQ-3 hand-held anemometer. flowing over the edge of the deck and wind combings will give inaccurate wind speed and direction. It is best to aim the sights of the AN/PMQ-3 toward the bow on a line parallel to the centerline of the ship. Hold the instrument at arm’s length and in a vertical position, with the indicator at or slightly above eye level, and align the sights with the true north reference or the bow of the ship (fig. 2-32). Depress the vane unlocking trigger to release the wind vane, and, at the same time, observe the indicated wind speed. CAUTION Activate the low-speed, range-selecting switch on the side of the casing on the newer models, or on the handle of the older models only if the wind speed is less than 15 knots. The indicator  will  be  damaged  if  the  switch  is activated during higher winds. Release the vane unlocking trigger when the wind Figure   2-32.—Aerographer’s   Mate   using   the   AN/PMQ-3   on   the vane yields a representative wind direction, and read the flight  deck  during  flight  operations.  Note  that  hearing wind direction on the wind vane azimuth circle. protection and a helmet are worn. 2-23





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