Activate the Timeshift Stone. Climb up that mast using the ladder. Use your bow and arrows to hit the targets so that you can access the zipline things. Then, at the top of the first mast, use the zipline again to get to the back of the ship on another mast. Drop down, and use your clawshots to access a target. Just drop down and the chest not to far. That's the best I can remember. I'm not sure if that's exactly it though.