Does the FAA all ow pilots to fly DIY GPS approach procedures?
or
Does the FAA require that a GPS approach procedure be approved and contained within the database?
Yes, currently DIY "cloudbreak" procedures are permitted by the UK CAA. It can't be called an approach procedure because such a procedure requires ATC.....hence the proposals spoken of above.
If a person decides to design a "cloudbreak" procedure then it is incumbent on them to apply the appropriate obstacle clearances as laid down by the CAA............This usually requires a survey of the area if anything less than 1000ft above obstacles (enroute minima) is used and requires plenty of forethought and planning.
It would be a shame to be completing the perfect GPS letdown at the local club only to colide with the other non-radio guy doing the same in a slower aircraft!!!!!
GPS is super accurate. Home made approaches are full of danger for the unwary..and most of the dangers are unrelated to the guidance system.
Regards,
DFC