The way I did it was to just follow Louise as closely as I could, I didn't have much trouble once I figured out what to do. Sprint to the boat, double tap to take out the sword, swipe up, then immediately start running forward and you should make it out.
I'm waiting for my friend's Wifi to cooperate, we plan to record a gameplay together when it does. If it's still acting up by the end of the weekend I'll just record one alone. Either way I'll post it here when done.
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