Whistle No. 5L Acceptable for use on Coast Guard certificated vessels 20 to 75 meters in length. Hear it! (pc) | Hear it! (mac) | Hear it!   (realaudio)   Specifications Free air consumed (cubic ft./sec.)   1.40 Net weight (lbs.) 70 Frequency cycles/sec. 140 Line size 3/4" db at 25 ft. 123 Audibility Distance Rating* 3 - 3 3/4 miles * Per Coast Guard Rating Method
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