Hey, so I know a lot of people out there use mines, specifically piling them up on jump points that hostiles are likely to come through and such, but I had a bit of a thought.
Why not put them at the survey location associated with that jump point?
See I've been trolling around in a game, and am about 3j from sol in every direction completely scanned. Made sure to drop a sensor bouy on each jump point, and I've only come across 1 alien race down 1 path, (3j from earth) nothing else. Now assuming that I did go and start expanding a bit more and came across say, an NPC grav survey ship, adn I were planning on preventing them from finding a way to earth. Wouldn't it be more effective to mine the survey point so their gravsurvey ships get taken out before they discover the actual jump point. If I mine the hell out of the jump point itself its fine, but if they already know where it is, they could get crafty with a mine removal type ship. At least I'd buy some extra time by having that gravsurvey ship blown up earlier.