Visual Distress Signals (VDSs) allow vessel operators to signal for help in the event of an emergency.
VDSs are classified as day signals (visible in bright sunlight), night signals (visible at night), or both day and night signals. VDSs are either pyrotechnic (smoke and flames) or non-pyrotechnic (non-combustible).

Orange Smoke:
Day Signal |

Red Meteor:
Day and Night Signal |

Red Flare:
Day and Night Signal |

Electric Light:
Night Signal |

Orange Flag:
Day Signal |

Arm Signal:
Although this signal does not meet VDS equipment requirements, wave your arms to summon help if you do not have other distress signals on board. |
Any Massachusetts waters that are subject to the rise and fall of the tide out to three nautical miles from any Massachusetts land point and including all of Massachusetts Bay, Vineyard Sound, and Nantucket Sound