1. A watercraft system comprising:
a planar body configured for moving across a water surface and for carrying a rider;
at least one fin coupled to a bottom portion of the planar body, wherein the fin defines a fully enclosed cavity; and
a ride tracking device disposed within the cavity,
wherein the fin comprises a base with a slot configured for receiving the ride tracking device, and
wherein the cavity becomes watertight by coupling the base of the fin to the bottom portion of the planar body.