You are playing Nightmare mode.

"Then I thought in my heart that we drew near to the Sea; for wide was the water in the darkness, and sea–birds innumerable cried on its shores."
–Legolas, The Return of the King

Begin with the standard quest deck and encounter deck for the Voyage Across Belegaer scenario. Remove the following cards, in the specified quantities, from the standard encounter deck:

2x Southron Sailor

1x Starlit Sea

1x Fog Bank

2x Calm Waters

2x Thrown Off Course

1x Scouting Ship

Then shuffle the encounter cards in this Nightmare Deck into the remainder of the standard Voyage Across Belegaer encounter deck.

Finally, flip this setup card over and place it next to the quest deck. Its effect remains active throughout the game, which is now ready to begin.

?*: Some Cards in the Grey Havens Nightmare Decks have Sailing Success symbols (?) with an asterisk (*) next to them. This indicates that the card has a Forced effect which will trigger when the card is discarded during a sailing test.