Originally Posted by BillieBob
Whilst anyone who thinks it is OK to conduct a 'self-made' instrument approach procedure is no loss to the aviation industry, the consequent loss of a perfectly serviceable aircraft, not to mention the innocent victims of such crass incompetence, is to be deplored.
It sounds laudible, BillieBob, but hides some oversimplifications about risk management and regulation.
Where notified IAPs exist, there would be little point in not using them -- and the law requires that they are used.
At airports where IAPs do not exist, however, the situation is more complex. Scud-running in poor vis for 30 mins to make an under-the-deck VFR arrival is certainly legal, but not usually safer than a carefully planned and executed let-down which has not been notified as an IAP by the CAA.
The law currently recognises that. The only notification for the purpose of Rule 40 is in ENR 1.5 in the passage that I have already quoted, and the intention appears very clear from the second paragraph.