This boat has a 2004 Mercury 90 horse power, in line 3, 2 stroke motor. OnBoard = Recording perspectives on and in the watercraft External = Recording perspective from bystander view Helm = where the captain operatives the watercraft Bow = front of the watercraft (more cutting through water and bounce sounds) stern = back of the watercraft (mixed of motor & water churning sounds) Port side = left side of the watercraft Starboard side = right side of the watercraft PART= A section of a longer take, split into sequential parts.