AEROGRAPHER'S MATE 3 & 2 



that thsy be entered both rapidly and accurately. 

 The size, type, and scale of the map, and the 

 amount of data to be plotted are governed by 

 local requirements. 



The arrangement of data around the station 

 circle is essentially the same as for the land 

 synoptic code plotting model. Figure 11-4 (A) 

 and (B) shows a typical station model used for 

 plotting, and a plotted model of the 3-hourly 

 airways code data. 



METAR CODE PLOTTING. — The METAR 

 code is used in foreign countries in lieu of 



aviation hourly weather reports. With the numer- 

 ous ships and overseas duty stations to which 

 Aerographer's Mates are assigned, it is nec- 

 essary that a working knowledge of this code 

 be maintained. 



The station model format is depicted in 

 figure 11-5 (A) along with an actual plot of 

 a METAR report shown in figure 11-5 (B). 



Surface Chart Analysis 



When all available synoptic weather reports 

 have been entered on the weather map, it is 

 ready for analyzing. A preliminary step in 



JT C M PPP 

 VVwwi(N)±ppa 

 ThTh C, 



d'd 



RR 



3 3 



(B) 



4 v n = 



58 



56 X 



120 

 + 18/ 



1 2 .18 

 ^G27 



REMARKS 



209.405 

 Figure 11-4. — (A) Station model for plotting airways reports; (B) plotted airways station model. 



T'T'C 



Ch 



m 



VVVVw'w'fN 



T d T d C L 



h s h s h s 

 (A) 



ddd 



-ym'm 

 ff 

 \ 



209.406 

 Figure 11-5. — (A) Station model for plotting METAR reports; (B) plotted METAR station model. 



198 



