corded at Shelter 605 on Runit; the gauges on Parry were served by the recorder at Shelter 606 on Parry. Table 2— LOCATIONS OF MEASURING STATIONS FOR BLASTLINES ON KING SHOT Landline Distance from intended Island ground zero, ft Runit 2,50€ 3,000 Station Azimuth No. (from north) 6101.01 161°08'07” 6101.02 7,000 6101.03 9,686 10,000 6101.04 Azimuth (from north) 617.01 143°30'00" 617.03 143°30'00"’ 153°38’ 26” 617.04 617.05 143°30/00”" 143°30' 00°’ 150°37'30"" 617.06 143°30'00°" 150°18' 20°" 15,000 Parry* Station No. 4,000 5,000 6,000 Overwater line 54,754 617.02 617.07 143°30’00"’ 143°30'00"" 617.08 151°45’00"’ 612.02 170°20' 27°" *Considered an overwater station because the major part of the path traveled by the shock wave was over water. s¢ Table J—-ELEVATIONS OF FOOTINGS FOR STATIONS OVER WATER ABOVE MEAN LOW WATER SPRING TIDE 5 5.1 Station No. Height of station, ft 617.01 617.02 617.03 617.04 617.05 617.06 617.07 617.08 1.63 0.18 2.06 2.30 1.39 4.75 2.02 1.43 RESULTS Performance of Instrumentation and Recording System Of the 22 air-pressure measurements attempted on Mike shot, 10 were completely successful and 3 partially so; on King shot, 9 of the 14 measurements attempted were entirely successful and the remaining 5 partially so. Consequently it is felt that enough satisfactory records were obtained to justify the conclusions reached in this report. It was necessary, however, in analyzing the data from both Mike and King shots, to exercise considerable personal judgment because of several unforeseeable failures of the recording and gauge systems. On Mike shot three of the eleven recorders failed to start at all because the brakes on the tape transport system jammed. These brakes consisted of asbestos brake bands around soft iron brake drums; the extremely high moisture content of the air in the recording shelters prior to Mike shot apparently caused the brake bands to swell and the drumsto rust, with the 21 cca