Chapter 3 — WIND EQUIPMENT 



WIND DIRECTION AND 



INTENSITY MASTER TRANSMITTER 



209.118 

 Figure 3-6. — Type B3 Wind Indicating Equip- 

 ment (shipboard). 



209.362 

 Figure 3-7. — True Wind Computer CP-264/U. 



and speed. The several methods used to do this 

 are discussed later in this chapter. 



This equipment is under the cognizance of 

 NAVSEA and is serviced by the IC Electricians. 

 The only responsibility the Aerographer has, 

 in connection with this equipment, is reading 

 the indicated data and maintaining the charts 

 and ink wells on the recorder unit (See discussion 

 earlier in chapter on the UMQ-5( ) recorder). If 

 errors appear to exist In the readings obtained 

 from the equipment, notify the IC Electricians. 



WIND COMPUTERS 



TRUE WIND COMPUTER CP-264/UM 



A plastic circular slide rule, True Wind 

 Computer CP-264U, is issued to all ship weather 

 offices for true wind computation (fig. 3-7). 



True Wind Computer CP-264U is an assembly 

 of imprinted plastic plates used aboard ship to 

 compute true wind speed and direction when 

 the apparent wind speed and direction, and 

 ship's course and speed are known. The computer 

 is also used to determine the ship's course 

 and speed required to produce a desired apparent 

 wind direction and speed. The computer consists 

 of an oval base plate and a clear plastic compass 

 rose fastened with a center pivot. The compass 

 rose is free to rotate and to slide along the 

 long axis of the base plate. All computations 

 are made directly on the computer, and solutions 

 are read directly off its scales. Directions for 

 use are printed on the reverse side of the base 

 plate. (The directions on the computer use 

 the term "relative wind", whereas this text 

 and FMH # 1 use the term "apparent wind." 

 Both refer to wind determined from equipment 

 orientated on the bow of the ship.) 



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