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). It might take around 5-10 mins to get the GPS signal.
The next time, the location will be found faster.
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) for approx. 1 minute (it will then find the location).
3) GPS will not be found indoor.
If you have any troubles or questions, make sure to let us know on firstname.lastname@example.org