A “Tide Pulley” can be used to solve this problem. When affixed to one of the attachment holes at the upper end of the KayaArm mast, the Tide Pulley enables height adjustment of the KayaArm arm that may be needed due to tide level changes upon return from a kayaking excursion.
A video demonstration of the Tide Pulley can be found below.
Figure 1 Close-up of the Tide Pulley on the KayaArm