tinkering, tinkering

attempts to fix helm/sonar bugs

added hulls to increase game interpreted size (makes cave generation larger), linked a missed oxygen vent

sweeping visual and functional changes, including redux of old rooms, near completion of C deck, addition of the legendary swimming pool, ballast re-structure and futureproofing, addition of both security and medical compartments, and likely more ive forgotten!

Outer shell restructure, gunnery room refitted and fleshed out. reactor/engine rooms now far more accurate. Ballast tank separated to make underside breach far less catastrophic