Homing Missiles have the text ATTACK [Target Lock]
pg 19 of the rule book calls this a requirement to use the secondaryt weapon. But Homing Missiles do not have the text that says spend your target lock, like all other missiles and torpedoes.
As I read the rules that mean that you need a target lock to fire homing missiles but you don't have to spend it simply to fire the missile. This lets you keep it, or use it to re-roll the attack dice for the misile attack.
Or does the Attack[Target Lock] imply that you have to spend your target lock to fire the missile?