- Erasing occurs just after the enemy team validates the repair.
- THEN you dive.
I think the enemy should not see the breakdowns of the surfacing ship.
This could give away the direction of a past silence.
As an example, here is a puzzle.
Before surfacing, Blue ship does (not necessarily in that order):
- 4 West moves
- 10 North moves
- 14 South moves
- 9 East moves
- 2 silences
When they hand their engineer mat for validation, the Yellow team reads:
- 1 West breakdown
- 1 North breakdown
- 3 South breakdowns
- 1 East breakdown
Then Yellow knows that one of the silences went South, and the other went "no move".