openingo One of these craft j, on a rescue mission from Newport^ was 

 unable to return there because of the impassable condition of the 

 yawuina Bay baro The seas outside (as obtained- from the Heceta Head 

 wave recorder) were as follows 2 



Upper 



Time Period H30^ KLO% 



10-27-47 0043 lie 7 5" 4o7 6o2 



1234 12o5" . 60A 8<,2 



10-28-47 0038 15«0»» 10«7 13ol 



0634 16.5 13o0 ISoO 



1347 - 14c5- 9»7 12 .,3 



1957 . I60O llol 13o4 



10-29-47 0046 15.0 8„5 10o7 



10»29-47 . fOBOOx Recorder unit taken to Depo© Bay and 



10=. 30-47 ' i200' used as surge recorder „ 



10-31-47 0945 9.5 . 10 o2. 13 ol 



2133 10o5 6o5 80I 



Some slight surging is not unusual in Depoe Bay and on the morning of 

 the 27th the boat movenent was not considered to be exceptional. 

 However^ as the day progressedj the surge increased in intensity and 

 by late afternoon extra bumpers and lines had been added to most of 

 the craft o Three boats were moored on long lines near the center of 

 the bay. During the evening many lines were parted^ the- dock ladders 

 were smashed and li^t fishing gear .vas damaged „ Flotsam in the bay 

 entrance was carried back and forth by. the surge and the larger 

 pieces caused considerable anxiety among the boat owners until they 

 ■were beached. It became increasingly evident that lines on the outer 

 boat and on boats at critical points would not hold 5 the owners of 

 these crafty, therefore kept a full time watch for the next 48 hours. 

 Engines were kept runningj as each surg -front reached the boat they 

 would run at full speed ahead for a few seconds to take the strain 

 off of the lines. The two Coast Guard boats were in a particularly 

 critical position at the entrance to the channel and on the larger 

 surges 'haej would ride up as much as two and one-half feet on the 

 wave front. 



At about 1600 on October 28^ 19475, the field party of the Waves 

 Project arrived at Depoe Bay and observed the surging. At intervals 

 of 10 to 20 minutes a series of 3 to 5 waves (often with a definite 

 front) about 40 seconds apart would come through the narrow opening 

 into the bay. The larger of these wave fronts would actually be 

 spilling and floating debris would surfboard on the crest. After 

 passing the end of the channel, these waves would diffract into the 

 bay losing most of their amplitude as they spread^ however^ enough 

 of the horizontal component of movement remained to move the boats 

 about and part mooring lines. 



33 



