The Phantom is a troop transport that appears throughout the campaign. The main gun hangs down under the nose of the vehicle and two gunner positions with turrets that poke out of the bay doors on either side. The main gun can rotate freely to fire in any direction (except up). While the gunner is concealed within the ship, the gun itself can be blown off.
This presents the player with two choices - either try to destroy the Phantom itself which will nullify all three guns and kill any troops not yet disembarked or go for just the guns which are softer targets. If you have limited fire power, this is usually the best option since the guns can deal some serious damage but the ship itself is of no threat. Since it would be unlikely that you could destroy the ship before all of the troops were off, you would gain nothing from actually destroying the Phantom.
