Originally Posted by
Pugilistic Animus
I don't think using your own GPS is legal
No hand held unit is IFR capable and not usable for Class II navigation
Although the Royal Navy demonstrably used a commercial handheld GPS that was probably so that they could get a good photograph.
MOD advise that commercial hand held GPS do not have the safeguards necessary to counter GPS jamming or spoofing.
You need a proper intergrated Sat Nav system where cross checking is performed by the system.