Sail to Abaco Island is an objective of Sequence 3 in Assassin's Creed IV.
Players must pilot the Jackdaw to Abaco island to hunt.
Walkthrough
Get your ship close to the Abaco Island marker (approx 100-150m)
Then hold the interact button ("B" on Xbox 360/Xbox One, "Circle" on PS3/PS4, "A" on Wii U) to release the ship's wheel
Dive into the water and swim to the island to complete the objective