You relocate the first station using documentation alone. No markers, no verbal help, and nobody will point. A certified assistant — a Divemaster or Assistant Instructor — or your instructor is in the water with you on every dive of this course, and on this one they have one more job: when you stop where you think the station is, they run the taut line from that point to the hub and record the offset, and the Entry records who measured it.
This is a rehearsal of a dive you will make years from now. It is procedurally identical to a return visit; the only difference is the interval. The reef has not changed over a course, so every difference you measure is your own method — which is exactly what makes it safe to learn on. A diver whose first return visit is a real one has no way of telling which part of the difference is theirs.
If two Teams are running, you will look for the other Team's station rather than your own. That is the harder and better test, because you cannot un-remember your own station. It also means your station's return capture is made by the other Team, so the floor you get is between two Teams — which is the honest floor for a real return, since the next visit may not be you.
Not finding it within the briefed search limits is a valid result. It is a measurement of the documentation, not of you, and the search is not extended to get a nicer outcome. Record what was ambiguous in the document, because that is the finding. You will still complete the re-capture on another dive — the certification needs it — but the not-found result stays in the record as the finding it was, and the repeat does not erase it.
Then re-lay both photo points in the same orientation, re-shoot, recover the instruments, and in the surface interval score the return and write down the difference, the interval, and the floor.