Escape Submersible
From Paragon Wiki Archive
Overview
Escape Submersible is an object belonging to the Arachnos faction. It has Lieutenant class hit points and no ranged nor melee attacks, nor it can move. This makes this item an easy target to destroy.
Heroes can find it on the Stop Nocturne and get the tape mission from Jim Temblor. (Levels 15-19)
The mission briefing suggests that Night Widow Nocturne will try to reach it (which would make you fail the mission), so destroying the sub before engaging Nocturne might be a good idea.
Description
Arachnos uses small submarines like this to sneak operatives into and out of Paragon City undetected.