Each player randomly draws 2 discovery tiles from their tile bag and places each onto a sonar board space; 1 in their segment of the sonar board and the other in the section directly across the centre from the first. Sonar board spaces are the circular green icons.

At 2 players, your segment of the sonar board consists of the 3 sections clockwise from your beam. At 3 or 4 players, your segment of the sonar board consists of the 2 sections clockwise from your beam.

If playing with 2 players, ignore the highlighted spaces on the sonar board.