Forged in Fire S07E19 - The Pira

Four smiths must navigate stormy seas by making Hada blades from the material harvested from a ship's wheel.  After confronting an ocean of problems in the first two rounds, just two smiths sail through testing to make it to the final challenge where they must recreate the symbolic and deadly Filipino sword: the Pira.  Which smith has the sea legs to survive the final testing and win the $10,000 treasure and the title of Forged in Fire champion?