IMO this mission could have been great but is a major PITA... Lotsa wasted time and false leads, THEN the Kaleun needs to navigate to the pilot THEN figure out how to "rescue" him..
To add $0.02 the mix, as posted, I discovered that the downed pilots drift, sometimes a LOT, and estimating the drift and taking a course to where the pilot
will be saves some aggravation. Unfortunately the game provides pilot location information sporadically, making that challenge a, well... challenge.
Good hunting!!