NEW LONDON, Conn. – A 45-foot Response Boat – Medium from Coast Guard Station New London transits near the New London Ledge Light at the entrance to the Thames River on April 14, 2017. Station New London’s Area of Responsibility (AOR) includes the Thames River and the northeastern section of Long Island Sound. (U.S. Coast Guard photo by Petty Officer 3rd Class Steve Strohmaier)

NEW HAVEN, Conn. – Coast Guard Sector Long Island Sound will be replacing traditional sound signals (foghorns) with marine radio-activated sound signals at eight different locations across Connecticut and three locations on Long Island.

Mariners that require the use of sound signals during periods of reduced visibility will be able to activate them on demand by momentarily turning their VHF-FM radio to channel 83A/157.175Mhz and key their microphone five times consecutively. This will activate the sound signal for up to 60 minutes. The current sound signal type and characteristic will not change due to this conversion. All light characteristics, equipment and patterns will also remain unchanged.

Affected signals:

  • Southwest Ledge Light, light number 21210
  • Greens Ledge Light, light number 21340
  • New London Ledge Light, light number 21825
  • Great Captain Island light, light number 21400
  • Penfield Reef Light, light number 21290
  • Saybrook Breakwater Light, light number 21115
  • North Dumpling Light, light number 20145
  • Race Rock Light, light number 19815

To provide mariners with a clear, comprehensive explanation of the new Marine Radio-Activated Sound Signals (MRASS) sound signals, a short explanatory Coast Guard video: