In the mIRC chat, we were talking; and Warboy mentioned that UFO crash site length is variable -- with the code being roughly:
RNG::generate(24, 96)*3600
Which is somewhere between 1-4 days.
My idea was this:
If you arrive in the last 20-15% of the RNG generated for an UFO crash site; you run into a special battle type -- the aliens have landed a RECOVERY SHIP -- I'd imagine it to be a slightly modified SUPPLY SHIP, with emphasis on having a lot of medical type equipment -- Luke83 has done some of the artwork for this (see attached photo); and lots of open space full of random piles of alien equipment -- such as melted down ingots of alien alloy from the hull of the ship being recovered.
An even crazier alternate is to have the RECOVERY SHIP be absolutely huge -- huge enough to have the UFO being recovered sit inside a huge hangar bay inside the recovery ship.
This comes from the line of thought I had regarding UFO recoveries -- the aliens have a few choices open to them:
First is to fix the UFO up enough to have it slowly fly off -- feasible for multi-engine ships
Second is to cut apart the UFO into pieces if it's too badly damaged (all power sources blowed up); like with smaller ships -- basically junkyard stripping it and crushing it into a cube.
Third is to obliterate the entire crash site with a UFO laser -- I'd imagine unfeasible for any of the larger ships; plus the huge flash of light and explosion would attract attention from human authorities.
Fourth is to pick up the damaged unflyable ship with a bigger UFO