My take on the Missile Boat- one of the defining elements is that it has massive missile reserves, but only carries two types of warheads.
A1 D2 H3 S4 Target Lock, Focus. Single Missile slot, single Torpedo slot.
SLAM system: Action- may make a straight move speed 1-5, but may not make a primary weapon attack this turn.
Dual Warhead launchers- When firing a missile or torpedo secondary weapon, it is not discarded when used.