Hello & Welcome,
To help you with this issue, may I ask:
1) Is the device fully function at this time?
2) The AGE of the device?
3) HOW do you intend to use the device?
Hi again Norm,
OK - so I suspect the most important question would be #3, about HOW you intend to use a device.
In all reality, the device should work just fine ANYWHERE on the planet that it can see the satellite signals.
I believe the "hard part" would be getting the locations of the "rocks" you are referring to.
Can I assume that you - or some other human - will be on a vessel of some size, going from rock to rock?
And do you know the coordinates of these rocks?
I see it has been a few days and I just wanted to follow up to see if you have any more questions concerning this issue or if the issue was resolved?
I look forward to any further questions or results that you may have.
Thanks, ***** *****--. .-(im)