Instructions
Climb the platforms outside of Gus' house all the way to the top, where you'll see the spinning airplanes ride.
Press "A" to jump onto one of the airplanes. Move to the tip of the airplane wing as it flies around to get in position for your next jump.
Press "A" twice to double-jump as the plane passes the wrecked ship. Land on the ship's deck and go past the cabin.
Spin-attack the valve to open the cabin. Head inside and press "A" to open the chest. You will now be rewarded with the Captain's Log.