Swinging Reposition question

[Xenomorph 27]

I have a player who is playing a pirate in Skull and Shackles and there is a issue when interpreting swinging reposition. What is the appropriate number for an Acrobatcis check to perform this? OR, does it really mean that the Charge/Bull Rush replaces the roll needed for an Acrobatics check?

I tried to look this up in the forums but only found questions.
I apologize if this has been answered or having read this has made everyone dumb.

Rogue Archetype Pirate

At 2nd level, a pirate incorporates a ship’s masts, rigging, ropes, sails, and other such structures into her combat style. Provided she is wearing light armor, when fighting in an environment Classes where such structures exist, the rogue incorporates them into her Acrobatics checks by grabbing hold of the structure and swinging toward her opponent, making either a charge or a bull rush maneuver. Once she completes her attack or maneuver, she can reposition herself. Immediately after making the charge or bull rush, she can move 5 feet as a free action, even if the charge ends her turn. This movement does not provoke attacks of opportunity.

I have two players who are going to fight it out to be captain aboard the Man's Promise.

Magus vs Rogue(Pirate)

[Castarr4]

Not helpful, but there's a typo on the PFSRD. The word Classes shouldn't be in there. It's correct on the PRD.

On a more helpful note, I think the phrase "Acrobatics checks" is likely something from the original draft that no longer really has a meaning. I don't see anything quite indicating an intended DC.... but there's really three possible interpretations that I see:

The CMD of the creature they attacked

A DC based on where they end up, from a DC 20 to leap upwards five feet into the rigging to a DC 0 to dodge behind the mast.

No acrobatics check, as it might be a typo.

Edit: Interestingly, the abilities Sea Legs and Unflinching BOTH replace trapfinding. This archetype could have used a bit more TLC by the editors, I think.