Source: Player's Guide to Faerûn
The sea is in your blood. You are no stranger to sea chases and blood on the decks.
Prerequisite: Human (Altumbel, the Dragon Coast, the Lake of Steam, Lapaliiya, the Nelanther Isles, the Sword Coast, or Tharsult).
Benefit: You gain a +2 bonus on Balance and Profession (sailor) checks. You ignore any hampered movement penalties for fighting on pitching or slippery decks, and you gain a +1 dodge bonus to Armor Class during any fight that takes place on or in a boat or ship.
Special: You may select this feat only as a 1st-level character. You may have only one regional feat.
Normal: A character moving on difficult or treacherous surfaces counts each square of movement as two squares.