Well, all very interesting reading, but I am not sure if anyone has really learned a lot here. The post went way off the original question and resulted in bad blood.
A couple of observations from me:
Satnav may not really know a lot about GPS but merely conducting searches on the Web and quoting technical data that sounds flash but says nothing. The majority of his posts are like this with added antaganistic remarks.
We all like to think we know a little bit about our chosen recreational hobby (fishing) and want to pass on that knowledge to others on this site. If it eventuates that we were wrong, it does not matter and should not dent the ego, we learn and we go on.
I have noticed a few posts recently end with members having dented egos and harsh words exchanged, this detracts from the site and its purpose (my opinion).
Regards, Mick