I proposed auto-generated minefields for FSO back when I was an active TBP member. I suggested that part of the asteroid field code would be used, as an alternative to manually placing large numbers of individual mines and cutting into the ships-per-mission limit. It would either require the mines to be listed in the ships table with a special class, or have a special minefield table be set up, so the capabilities of different mines can be specified, such as detonation range, stationary vs. homing, whether they have defensive turrets (a la Centauri Blockade mine), whether they are fully detectable, non-targetable (flashing blip), undetectable (not on radar), or cloaked, yeild, etc. The FRED minefield controls would also allow the size of the field, number of mines, and safe zones, just like with the existing asteroid field editor (though it could use the ability for multiple fields and multiple safe zones), but also whether they are in ordered or scattered layouts, as well as include the ability to mix different types of mines within the same field, with controls for the percentage of each type.