I am in the middle of a vacation & noticed no GPS data when I was reviewing a days shooting. The green light is constant on the GP-1 & when I check in the GPS menu the Position is greyed out. Pressing ok gets the message "This option is not available with current settings". The settings have not changed since it was working perfectly. Is this perhaps Nikon speak for even with a green light there are not enough satellites? There is nothing strange with my settings I'm a Raw, A priority shooter.