TURN ANNOTATIONS ON! - Found by myself on 05/04/2014 (NOT PATCHED)
[WORKS ON ALL PLATFORMS as of 2nd January 2015]
Having issues defeating Legendary ships because of your Jackdaw's weakness? With this glitch you'll actually be able to JUMP ON a Legendary ship, killing all of its crew.
WARNING: You CANNOT swim directly to the Legendary Ship, because it'll disintegrate you firing all its cannons at the same time when you'll be near it if you haven't started the pre-fight cinematic. And you can't climb any part of its hull.
If you find any problem, write it in the comment section below. The best suggestion I can give though is: keep trying.
Tutorial for mobiles (No annotations on mobiles)
Step 1: Bookmark the Legendary Ship. LEAVE THE WHEEL right before reaching 570m distance, that's where the cinematic will start when the Jackdaw will pass this distance thanks to inertia speed.
Step 2: Jump at the right timing on the Legendary Ship (Edward can't grab any wood beam) It won't be easy, it's all about the waves of the sea and luck. Keep trying.
Step 3: Kill the crew (Be careful while climbing, a legendary ship is totally bugged, you may risk to fall to your death.)
Step 4: Get back to your Jackdaw, fire one shot and the enemy ship will sink automatically.
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