Description • Solas approvedSea Flash lights are extremely bright LED lights which automatically activate when the small sensor at the end of the trailing wire makes contact with the water. Sea Flash can be activated manually (both on and off) when the water sensor is in the water by simply pressing the red button on the front of the main body of the unit.Sea Flash with 'Multi Flashing Sequence' FLASHING - STEADY - SOS - OFF, is available by pressing the red button whilst the water sensor is in the water.