MEASURED 



- OBSERVED 



80 



y 60 



40 



5 20 



TIME 



FIGURE I . 



COMPARISON OF MEASURED AND OBSERVED WAVE HEIGHTS. 

 OBSERVER I OF THE LIGHTSHIP FEHMARNBELT, 

 SEPT. 22-30, 1936. 



WAVE LENGTH AND FREQUENCIES 

 NOT DETERMINED 



MEASURED 

 OBSERVED 

 CALCULATED 



TIME 



FIGURE 2. 



COMPARISON OF WAVE LENGTHS. OBSERVER I OF THE 

 LIGHTSHIP FEHMARNBELT, SEPT. 22 - 30, 1936. 



13 



