Actually it is! The ATPL/CPL theory teaches and examines GPS systems in reasonable detail. I would disagree in allowing somebody to use a GPS for the enroute nav detail of the CPL, if somebody can't predict their future position within reasonable tolerances 100% of the time by flying a heading and speed then they can't possibly qualify as a professional pilot (IMHO). Once a pilot flies commercially, their type rating and/or line training will teach them what they need to know about the kit relevant to their operations.
Well if your opinion is correct I can not possibly be considered a professional pilot because there have been many times in the past I was not anywhere near 100% sure of exactly where I was.
However since the navigation aids have improved from the Radio Range when I first started to fly to what is available today my averages have improved considerably.
The GPS is beyond doubt the most accurate aid to navigation we have ever had not to mention it is a VOR, ADF,DME and map all in one easy to understand and use unit.
IMHO that is.
The difference in long over ocean navigating today using GS compared to D.R. and ADF is like having progressed from the horse and buggy to the jet age. Map reading on trans oceanic flight is not an option.
Mind you the ADF was nice to have sometimes when we couldn't get a star or sun shot with the astro compass.
