The Garmin eTrex Vista HCx is a waterproof WAAS-equipped GPS receiver which is similar to the Vista Cx. Some of the features of this model include an electronic compass, barometric altimeter, automatic routing, and a MicroSD card slot which is located in the waterproof battery compartment. You can expand memory by inserting preprogrammed MapSource MicroSD cards containing street maps, terrain maps, and coastal/ocean maps. The Vista HCx also has USB support for transferring travel data to your computer.
