Okay I have a skirmishing character and this issue has come up regarding the rules for the ability Swinging Reposition, which is part of the Pirate archetype in Ultimate Combat. The rule reads as such:
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 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.
This ability replaces the 2nd-level rogue talent.
The question is does the use of this ability act as a charge, an acrobatics check, or both? Also what is it limited by? The actual situation that came up was my character attempting to use this ability in difficult ground.