Whistle No. 1H Hear it! (pc) | Hear it! (mac) | Hear it! (realaudio)     Specifications Free air consumed (cubic ft./sec.)   .20 Net weight (lbs.) 3 1/2 Frequency cycles/sec. 720 Line size 3/8" db at 25 ft. 115 Audibility Distance Rating* 1 1/2 miles * Per Coast Guard Rating Method
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