Paralenz Vaquita comes with a built-in GPS antenna.
There are few things to remember:
1) When getting the first GPS fix on the camera, it's important to be outside, in an open space (not too many trees or buildings). Depending on weather conditions and distance from the closest satellite, it might take around 5-10 mins to get the GPS signal.
2) GPS does not travel underwater - so if you want the location to be set on your dive log, it's good to keep the camera (while turned on) above water until the GPS is set.
3) The camera will not find GPS indoors.
If you have any troubles or questions, make sure to contact us here.