Just Cause 3

This achievement may sound a bit daunting at first, but in fact it is pretty simple.

While being in the Rocket Boat, and as soon as you have a few lock-ons (preferably the smaller enemy boats as ships take a couple of hits) , just tap the button to "jump" out of the water and immediately spam the button.

You will eventually hit and destroy a few.

Enemy choppers do count as well.

I haven't found a way to keep track of the enemies killed.

Just keep repeating these steps (B, then LB) until the achievement pops.


(Please note : the clips were recorded by Xbox One's Game DVR. Therefor, any eventual unlocking achievements appeared on my screen were not registered by the Game DVR)

EDIT: as pointed out by Tuschi, you need a boat delivered through the Rebel Drop List.
Personally, I'd like to add that you must have the MOD active.
In order to do so, you might to earn a few gears on some sea vehicle challenges.

Any suggestions to improve this guide are welcome!

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Good luck!