Set up as normal for a 2-player game. When placing the achievement board, you may use either side. However, the 3-point bonuses included on side B, are only awarded when playing at difficulty 5.
For Nautoma do this (and only this):
1 Select a color for Nautoma and give her the divers in that color.
2 Give Nautoma 2 eggs and 1 young from the supply.
3 Shuffle the decision cards, set 1 off to the side without looking at it, and place the rest face down as the decision deck. You take the first turn every week.
4 Near the achievement board, place the 3 Nautoma achievement cards with the calm or stormy side face up, based upon the difficulty level.