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3
1
3
1
It is 3 NOT 7 as previously answered.
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mostly 3 must be on board
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The minimum number of pyrotechnic Visual Distress Signals (VDSs) required on board varies by jurisdiction. In the United States, for example, the minimum requirement is typically three pyrotechnic VDSs, which may consist of either three hand-held devices or a combination of hand-held and aerial signals. It's important to check your local regulations to determine the exact requirements for your area.
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3 or more
must be pistol-launched