The first power in a player ship is the ship’s default power, fired repeatedly when in auto-fire mode. Obtaining additional Broadside powers for use in combat are acquired by purchasing additional ship equipment.
Attack powers are always on Figureheads and Horns
Defensive powers are always on Steering wheels and Sails
Heal powers are always on Steering wheels
Speed boost powers are always on Sails
Additional Broadside ship equipment can be purchased from a ship parts vendor found on various docks.