Calling activity at stations based upon 5-crew counts. 
FIGURE 4. 
90 — 
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XICNI ALISNISG AININOIE. 
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STATIONS 
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MAQNI ALISNIG AINFNOFYA 
' ‘ 1 r iy me ' ’ T t 
12131415 16 17 18 19 20 
10 II 
a a 4 
7 8 9 
2O 
STaTIONS 
