Of the many skills we teach new RV drivers, two of the most important are 'Mirror Use' and 'Pivot Point'. For the non-commercial Class A & B license in California one of the skills you must demonstrate to the examiner is the '90 degree Off-set Alley Dock Backing'. The DMV gives you a 12 foot by 40 foot box that they want you to back your RV or Trailer into from a position that is parallel to a line 50 feet from the opening of the box.
Imagine trying to do this if your mirrors are NOT set correctly or if you do NOT understand the Pivot Point of your RV, IMPOSSIBLE!
We have posted a video of a recent student showing how this backing up skill should be completed.