Used this button as a man overboard button on my boat. Click on it and the chart plotter will automatically record the GPS position. The button has both normally open and normally closed contacts and a display. This allows the button to be slightly highlighted, but when pressed, the light goes out, signaling that the button was pressed successfully. It includes an O-ring for easy watertight assembly. I'm not yet sure how well it will hold up under the corrosive effects of salt water.
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