A communication jack that withstands insertion of a communication plug with which the jack is not configured to mate without being damaged. The system includes a vehicle-mounted liquid holding tank and associated conduits and pump for moving water into and out of the holding tank, respectively for increasing and decreasing weight of the vehicle as needed for traction requirements during and after boat launching and retrieval operations. An electrolyte reservoir, which compensates the electrolyte losses from the fuel cells is provided at the end, or in the vicinity of the end of the fuel cell stack, said electrolyte being transported to the individual fuel cells by electrical forces within the fuel cell stack. A number of first ground vias on the first bonding pad and a number of second ground vias on the second bonding pad are electrically connected to the ground layer. The scanning method can be switched between the low resolution mode and the high resolution mode automatically based on whether the low resolution data is sufficiently accurate to decode the symbol.