Northern 29 Bilge

Can anyone tell me how to empty the bilge of a 1976 Northern 29?

There is no switch button on the panel, so I’m wondering if it’s done manually (and how?) or where is the manual switch to empty it.

Thank you.

you should have a bilge pump in there somewhere. Look for the lowest point in your bilge possible right behind or under the motor. the switch may not be marked, and there are manual bilge pumps available, but I’m sure this has an electric (12v) pump and really should have two, a primary and a backup.
the switch may be located on your power panel. By the layout on Sailboat data probably just to the starboard or port side of your companion way. (door to the cockpit)