100' Max Depth, duration about 17-20 min. to traverse nearly entire length of Yukon. Entrance was the Starboard "High Side" access point in the Mortar Well (where the Wreck Students generally enter for Line Laying Skills), and the exit was the Dolphin Entries at the extreme Bow.

With Andrew Ainslie of SoCalTechdivers leading, traverse was along the High Burma Road Route, keeping the Starboard Cutouts 3S7 through 3S1 ("The Skylights") always close by and above for emergency egress. Slight zig-zag at the end to reach the Dolphin Entries, but daylight from exiting cutouts ahead was always illuminating the pathway. Line Reel not needed, but is defintitely mandatory for a Low Side Burma Road Penetration in the Silt --and for the Wreck Class as well, or else the Instructor's Blue Gloves of Death will come by and personally strangle you for not using one ! (See 5thd-x's Tech Diver Teaser Video about the "Blue Gloves of Death"):
http://www.breakthrudiving.com/xducation/dvds/techdvd.html
http://www.breakthrudiving.com/videos/TechTeaser.mov

Lastly, had no problems fitting through the bulkhead entryways inside with a Stage Bottle, BUT --manipulating a Reel along with a Stage Bottle could be difficult and fraught with entanglement issues. Used about 2200psi total of an AL80 Stage 30/30 mix after switching to it at the Mortar Well Entrance, and riding it through Minimum Deco to the Surface. . .