alarm beeping warning sound

I'm a noobie to boating FYI. Just purchased a used Sundancer 300 and drove it to Port Washington, NY from Patchogue, NY with no incident. Took it out a few days later with no incident. Docked the boat, plugged into shore power and left the boat on shore power overnight. Came back next morning...

Hi guys, I get an annoying helm alarm beeping floating up from somewhere under the instrument panel every time I go over around 10 knots. It does not stop until I slow down and then stops completely. No overheating according to gauges. Oil just topped up. No change in speed and no special...