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Figure 1 1 . Near-bottom current vectors along each transect for 08 October 1 997 



Video Tape 



During the course of the field study, a video camera was placed at the top of 

 Fort Gratiot Lighthouse to record vessel traffic and observe vessel-generated wave 

 characteristics that resulted both offshore and within the basin for various vessels 

 and transit directions. Twelve hours of recording on six tapes were obtained on 

 30 September and 1 October 1997. A total of 18 vessels varying from small 

 recreational boats to large freighters were recorded transiting by the boat basin. 

 Table 1 summarizes the vessel name, type, length, draft, direction of transit, and 



Chapter 3 Field-Data Collection 



17 



