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Title 33--Navigation and Navigable Waters
CHAPTER I--COAST GUARD, DEPARTMENT OF TRANSPORTATION
86--ANNEX III: TECHNICAL DETAILS OF SOUND SIGNAL APPLIANCES
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 | 86.01 | Frequencies and range of audibility. |
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| 86.03 | Limits of fundamental frequencies. |
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| 86.05 | Sound signal intensity and range of audibility. |
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| 86.07 | Directional properties. |
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| 86.09 | Positioning of whistles. |
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| 86.11 | Fitting of more than one whistle. |
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| 86.13 | Combined whistle systems. |
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| 86.15 | Towing vessel whistles. |
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| 86.21 | Intensity of signal. |
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| 86.23 | Construction. |
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