I know some of you just blow up at anything that could be considered "premeasuring" or measuring just because you can although it may provide added information. The previous king of this was using Target Lock even if the "target" may be out of range but now we've got the Seismic Torpedo which only cares about R1-R2 and having things in arc.
Looking at Seismic Torpedo it appears that we get to range out obstacles to see if they are at R2 or closer and also to see if they are in-arc. If the obstacle does NOT meet both of those requirements one gets to back up.
The only thing that has me questioning if this is a great rangefinder that would allow you to shoot range and firing arc to every obstacle is the way it is worded. When you attempt to pop this upgrade you "choose an obstacle" which you would then need to range/arc check to see if it is legal; my question is simply if the obstacle you choose fails do you get to back all the way of spending the upgrade or must you check to see if there is an obstacle that does not fail the checks.
If there are no obstacles at R1 or R2 and in arc then Seismic Torpedoes will allow you to range/arc check before backing out to perform a different Action. The only thing that would stop it from being reusable in that task is if you MUST choose an obstacle that meets those conditions if you can.