Revealing The Wyrm's Mission

So you're a Terran Resistance fighter standing on a pier in Texas, looking at a half-constructed, enormous submarine being fitted out.  What gives away it primary purpose?

My first thought is that you notice the four enormous NL55's waiting to be delivered by crane into their turrets. As opposed to the few tons that a 'Mech-scale laser would weigh, these weapons would be 1,100-ton monstrosities, and as large as many of the small boats running around yard.  The capital missile launchers would be modest by comparison -- about the size of a large BattleMech, accompanied by a host of missiles the size of small to medium BattleMechs.   Among all the weapon systems being loaded onto the ship, these would stand out as being obviously the primary armament.

It would also  be obvious that the ship has a pressure hull rather than a displacement hull, and is designed to completely submerge.  The enormous turrets full of weapons scattered about the ship would seem to suggest an air defense system, while the numerous torpedo tubes would make it clear this vessel is capable of dealing with threats of all types.  It will be immediately obvious to anybody acquainted with the difference between law enforcement and military duties that this is a warship, not an interception and inspection cutter.

Finally, as the tour winds inside, the space tracking RADAR and independent engagement systems separate from the ground-based search systems will confirm that this vessel is built to repel a major orbital action in Terran orbit.  Hopefully by this point the ComStar members of the party at least will recognize that this ship and its sisters could serious compromise ComStar's next attempt to retake Terra.