as the wind speed decreased. At the start of measurements on this day, the signi- 

 ficant wave height is about half a meter less than that ending the previous day and 

 the modal wave period is one to two seconds longer. The lower wave heights and 

 longer periods indicate a decaying swell condition and is born out by the lower 

 measured wind speed and change in direction. This shift into the swell range can 

 also be seen in the spectra of runs 26 through 28 (Figures IT and 18). 



A single wind measurement on the 17th indicated a low speed and a direction 

 out of 300 degrees. On this day, a maximum modal period was reached for each buoy 

 and a local minimum significant wave height was measured. 



The l8th was the last day that several measurements were recorded in suc- 

 cession. After an initial drop in wind speed, the speed increased to a maximum 

 during run 35, before dropping off. During this time, the wind shifted from about 

 150 to 215 degrees. The significant wave height measurement slightly increased and 

 decreased with the wind speed, while the modal wave period decreased. This indi- 

 cates an increase in wind wave energy accompanying a slowly decaying swell. 



The last three runs were made on separate days at different locations. 

 Throughout the trial, the total energies measured by both buoys are very close, as 

 indicated by the significant wave heights. The mean and RMS values of the percent 

 differences of the two buoys are 0.32 percent and 6.7 percent, respectively. The 

 modal wave periods are also quite close, with a couple of exceptions, until the end 

 of the 15th of May. However, from the l6th until the 21st, the WAVEC buoy measured 

 a larger modal period than the Wave-Track buoy. The mean and RMS values of the 

 percent differences are U . 5 percent and 7«0 percent, respectively. 



As mentioned earlier, the wind direction is steady, around 170 degrees, from 

 Run 3 to Run 2k . The observed wave directions on the lUth are coming from 200 

 degrees. On the 15th, the observed wave direction is more closely in line with the 

 measured wind direction. The directions differ by about 20 degrees near the 

 beginning of the day and then close to the same direction towards the end of the 

 day before the wind shifts direction. On the l6th, at location four, the observed 

 wave direction is back to 200 degrees. On the l8th, at location six, the direction 

 that the waves were observed to be coming from was 330 degrees. 



The direction that the waves were observed to be coming from agreed more 

 closely with the mean direction of the dominant frequency for the Wave-Track near 

 the beginning of the trial and more closely with the WAVEC toward the end of the 



