Hammering is part of a Ship Repair mini-game, that pirates can play in order to fix their vessel at sea, or to earn some pocket money repairing vessels at the tables stationed around each Shipwright stand. These tables are marked with signs, indicating the difficulty of the repairs needed.
At sea, simply walk to a part of our ship that has a hole in the deck and press Shift. When sailing, the difficulty will vary depending on how damaged your ship is.
Looks simple enough, just hit the nail on the head. But, you must hit the nail exactly when the cross-hairs are in the correct spot or you must keep pounding until the nail finally goes in.
In this challenge, move the hammer over a nail. A target will appear and begin to grow and shrink about the nail.
Try to time your left-click when the target is the smallest for the greatest impact. If you miss, you can keep hitting until it's all the way down. The longer it takes, the less gold you will get because you're doing terrible at it!