KEY 



4-5 5 

 3-3.5 



45 



35 



? 25 



15 



PERCENT OF TIME WAVES 



OF DIFFERENT HEK3HT 



OCCUR FROM EACH 



DIRECTION: 12/-i8-t2/73 



15 



25 



35 



45 — 



Figure 10. Ship observation wave rose (from Gutman, 1976). 



41 



