Don't know what happened to it however in about 2000 there was an airship operating in mine clearance. It was fitted with radars and GPS that could map mine fields from the air.
Reason for using the airship was that it could stay up for a long time, was stable and could move slowly.
Once you knew where the mines were the rest of the area could be opened back up as accurate maps were produced as part of the process. One of the problems was that mines stopped use of all areas until the slow clearance process was completed. This was to then allow the clearance process to be directed to where it was needed.
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