. Aerographer's Mate 3 & 2. United States. Navy; Meteorology; Oceanography. AEROGRAPHER'S MATE 3 & 2 T-. Figure 4-14. — Data receiver and control as- sembly. ANALOG RECORDER (RO-447/GMQ-29( )).— Mounted directly below the Data Receiver and Control Assembly, it is used to record wind direction and spsed (discussed in chapter 3 of this manual; see figure 3-4) and precipi- tation to be discussed later in this chapter under rain gages. INTERCOMMUNICATIONS GROUP (OA-8785/ GMQ-29( )). —At selected installations the AN/ GMQ-29( ) is equipped with a voice channel, which provides for us
. Aerographer's Mate 3 & 2. United States. Navy; Meteorology; Oceanography. AEROGRAPHER'S MATE 3 & 2 T-. Figure 4-14. — Data receiver and control as- sembly. ANALOG RECORDER (RO-447/GMQ-29( )).— Mounted directly below the Data Receiver and Control Assembly, it is used to record wind direction and spsed (discussed in chapter 3 of this manual; see figure 3-4) and precipi- tation to be discussed later in this chapter under rain gages. INTERCOMMUNICATIONS GROUP (OA-8785/ GMQ-29( )). —At selected installations the AN/ GMQ-29( ) is equipped with a voice channel, which provides for use of the existing trans- mission lines for the additional purpose of full duplex voice communications between re- mote and local stations. Theory of Operation Functional operation of the Automatic Weather Station AN/GMQ-29( ) is dependent upon the fol- lowing principles. Individual sensor outputs are converted by their associated signal condition- ers to voltage levels. Timing and control cir- cuits then control data transmission over a single telephone line to the data receiver. Rain- fall information, is accepted by the formatting circuitry directly from its signal conditioner. At the display unit, the data is received, its validity verified and then routed to appropriate internal destinations for computations, record- ing, and display. For a more detailed description of the AN/ GMQ-29( ) Automatic Weather Station, refer to NAVAIR 50-30GMQ-29-1, Handbook, Opera- tion, Service and Overhaul Instruction. DIGITAL VOITMSUR WIND DIRECIION • a<IMUU T(MP(BAIU»f MIN,«UM HMPfBAtUM Figure 4-15. —AN/GMQ-29( ) Readout panel. Maintenance Although most maintenance is performed by the electronic technicians, some maintenance can be performed by the Aerographsr's Mate, This includes the visual inspection of the equip- ment. Refer to Table 14-1 for a complete in- spection list. If no electronic technicians are attached to the unit, refer to NAVAIR 50-30GMQ-29-1 for guida
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