When the Legacy is within range of an enemy base, switch to Sea-to-Land mode to take out the missile launchers. Beware, each base has a fail-safe that will instruct the launchers to fire immediately upon your arrival. This means you only have a small window of time to destroy the launchers before you must change battlefronts and defend your cities.

Sea-to-Land mode is also used when docking at a friendly city for refueling. Be sure to keep your finger off the trigger while docked, or else you might blow up your allies!