Q) If The Sutherland fires on a target at range 3 using torpedoes and then uses Secondary Torpedo Launcher, can it use it's text to re-roll the dice from both attacks?
A) Yes. The text permits a re-roll when you initiate an attack. Secondary Torpedo Launcher initiates a second, separate attack.
Q) Does Sutherland's ability allow you to reroll the dice rolled for Preemptive Strike?