Coast Guard completes installation of Mariner Radio Activated Sound Signals in Northeast

May 13, 2019 – The Coast Guard has completed the installation of Mariner Radio Activated Sound Signal (MRASS) devices at 82 lighthouses across the Northeast. The Coast Guard began updating the sound signal devices in 2015 and will complete the final two installations this spring. The purpose of the modernization was to replace the less reliable and less efficient VM-100 fog detectors with a Coast Guard-designed, radio-controlled system. The process also eliminated several 24/7 continuously sounding horns. Mariners needing foghorn assistance must now activate the sound signal by using a…

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