began to recede immediately taking the dock out with it and they 

 turned the Rosemary around to ride out of the channel with the 

 tide. Valley said the only indication he had that it was a wave 

 they were riding was when it approached the shallow land off 

 Spruce Cape (Figure STb) and the water curved upward along the 

 shorelines. 'It ran up on Spruce Cape, and as it came up in a 

 shoal it kept building up higher and higher until it was a big 

 comber. And it just rolled right over the land. I thought 

 probably the Loran Station would go, but it didn't. And the 

 same thing happened on Woody Island - it ran up into the trees . 

 But as far as the center of the wave was concerned you couldn't 

 tell it was a wave ' . " 



With the adjustments made in timing, the evidence of Jones, the 

 Fremlins, Powell, Miller and Barr, as plotted in Figure 90, become co- 

 herent. Also shown in Figure 90 are the water levels cited by Kodiak 

 Tide Observer (KTO) in messages transmitted to the Honolulu Observatory 

 of the U. S. Coast and Geodetic Survey (Spaeth and Berkman, I966), which 

 appear to agree fairly well in all but the last observation at 11:15 

 p.m. It is not known whether these data are based on Kodiak City or 

 Women s Bay . 



We return to consider Tilley's observation, now largely unsupported 

 except in the qualitative sense that Miller and Powell acknowledged a 

 "first" wave prior to the tide wave of 6:30 p.m. However, Tilley's 

 observation of an abnormally low. tide at 6:10 p.m. is also unconfirmed 

 except in a qualitative way by Brechan (Norton and Haas, I966). Despite 

 the apparent confusion of time in the evidence of others, we are in- 

 clined to give Tilley the benefit of the doubt by conceding that there 

 was such a first wave with an effective period of ^40 minutes (Figure 90). 

 We may show, too, that the natural period of oscillation of the quasi- 

 basin between Womens Bay and Kodiak is of this order and favors his 

 observation. 



Figure 87b shows that the quasi-basin from Womens Bay to Kodiak can 

 be approximated by a basin, oriented NE-SW, with a bed sloping uniformly 

 from zero depth off the point of Nyman Peninsula to a maximum of 70 feet 

 at the Kodiak breakwater (at low tide). For such a triangular depth 

 profile, the fundamental eigenperiod (cf. Wilson, I966) is 



Tj^ = 3.28 L/ v^3_ (Ul) 



where L (= 6 nautical miles) is the length of the quasi-basin and 

 d-]_ (= 70 feet) its maximum depth. For these values, T^ is h2 minutes. 

 We conclude that Tilley was correct in his observations, and that two 

 further aspects of this oscillation may explain why it would not have 

 been very noticeable in Womens Bay and at Kodiak City. The location of 

 the city dock in St. Paul Harbor (see Figure 89) would agree approxi- 

 mately with maximum depth of the quasi-basin envisioned. From the city 

 dock to Kodiak, water depth decreases considerably. At the opposite 



146 



