I can't readily find a link, but I recall a device that was plumbed into the discharge of the pump of a marine AC system, downstream of the AC unit itself, which would suck up the condensation from the tray under the unit (or a sump, I guess) and expel it from the boat along with the raw water.
No moving parts. Venturi effect. Surprisingly expensive for something so simple, as memory serves me.
Bill
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