Ok, so last night I decided to act on one of these tip-off messages (which I've previously ignored). After much fiddling around trying to get to the right coordinates I finally found the wreckage and went for a drive around it in my SRV. I found a heap of canisters around it but I couldn't find the actual data core which I was meant to scan. Nothing was coming up on my radar for the data core. Am I doing something wrong? Was I meant to scan it from my ship, perhaps?