When I decoupled the Tug, I tried to click on the capsule and see if I could 'control from here', but it wouldn't let me. When I went to the map, it did not show the Tug ... yet returning from the map the Tug was floating there next to the Station. Yes, I had a pilot in the Tug. The only thing missing from the Tug was fuel - it was loaded with RCS mono-propellant, but no fuel (Liquid & Oxi). When I went to Tracking, the tug was all of 10m or so from the station, just floating. When I got to Tracking, all that showed was the Station, no Tug. When I returned from Tracking (back to the Station), the Tug was gone. The debris page showed nothing (I keep a clean spaceport and orbital environment... everything comes back down and gets recovered). Being new to the game, I'm not sure where to look for the save file. I just now went to the pilot selection screen to check for the lost pilot's name - and he's gone lol ... now it shows no lost pilot. Very strange. The Station's name is simply "ISS". I know, not very original. The Tug's name is "RCS-Tug n", where 'n' is the Tug number... for when I have more than one aloft at a time. At the moment, I have one Tug (another, launched last night) at the Station. I have no mods installed. I'm looking at the docking alignment and camera tools though... maybe... tempted... I like playing a vanilla game. I'm going to try to duplicate the circumstance. I'll keep you posted. Thanks for the replies. Ferret