Looks like this is female so it will do that but I would recommend a smart wye. You need (2) 30amp 120volt power sources that are out of phase to power your boat with a wye.
It is a good deal. Bought a new boat that has a 50 amp service. Best way to sell fast, sell reasonable.
50 Amp Male - 2 30 Amp females. Made to convert a 50 amp service at the pedestal to 2 30 amp connectors (boat has 2 30 amp cords).