This is a very worrying paper, primarily because I would guess its authors and their recommendations will carry some weight with some beurocrat somewhere. As has been said someone is going to take these recommendations seriously!
The trouble is this is a crap report. It is the sort of report that is presented to medical journals frequently but thankfully are mostly refused publication after peer review exposes its flaws.
What this study has done is:
1. Think of a potential problem
Don't examine the problem but think of a theoretic potential for a problem.
2. Do a study which DOESN'T examine the problem but examines a theoretic point several stages removed from the problem.
3. Find some (anything will do) effect using non-real world testing equipment.
4. Extrapolate the findings back toward the problem. (But ignore the fact that no problem existed in the first place.)
This study should have been preceeded by a study examining whether GPS gave wrong readings while navigating - Its easy enough - just fly around and log when you do and don't end up where you should. If there was no problem then stop doing the rest of the study!
IF there was a problem then go on to try to find the cause of the errors. But these blokes themselves state there was no evidence of problems - then go on to make recommendations for major changes.
