Who is Al Giordino from Treasure and what is their importance?

Al Giordino is Dirk's right-hand man and best friend. The two have traveled around the world together, searching the depths of the oceans for mysteries. It's Giordino who throws a wrench at the terrorists who are chasing them, which earns the two men enough time to put a bit of distance between them and their pursuers. Giordino is loyal to a fault and has an excellent sense of humor.