I don't think that mine automatically destroy a ship. If the mine was weak enough and a larger enough ship passed through the components could absorb the bLast and still have enough left.
I had a mine group orbiting one of my frontier planets a fleet attacked the world and I had 4 partially damaged ships attacking after the mines were used up. So unless 3 of the ships were previously damaged (which is a possibility but there were no strange warp points near there) they all took partial damage from the mines. 4 of their ships were destroyed outright and there were no ships undamaged after hitting the minefield. Now when I hit a minefield all the damage seems to concentrate on ships one after another leaving at most one damaged ship. Hopefully this wasn't just an isolated incident and mines damage ships randomly and not just one after another.
[This message has been edited by Tomgs (edited 02 January 2001).]
I think this change was awesome. No more super transports that can lay mines/sat's/fighters. I actually have to think about my mine and sat layers more and balance cargo space vs unit launch capabilities. I've started building dreadnaughts that have 20 lauch bays so that I can launch more units per turn. It's also made those bays actually have a real use beyond give a ship the ability to launch units.
The only problem I have with this change is related to fighters and not being able to transfer cargo from a transport ship carrying fighters to a fighter carrier. It would be nice to do ship to ship transport without the need for a planet to be present.