VOD80 the opinion that I offered regarding flying safely is based on common sense.
In today's very complex airspace with many aircraft flying in said complex airspace it is very important that you know where you are and where you are heading at all times.
To compound the difficulty of flying in these busy airspace's one can encounter low visibilities due to air polution among other factors.
Depending on situational awareness with only a map and compass and time and distance is not good airmanship when for a very small money investment you can have a portable GPS which is more accurate position wise than you can relate to by looking at the ground even on a severe clear day.
It is not my intention to demean your ideas about navigating nor do I want to down play your map reading ability or flight planning ability. I am only trying to point out that not using a GPS is taking an unneccesary risk when there is no valid reason to take said risk.