How amazingly fascinating is this thread - it should be a sticky comprising the most interesting non-precision approaches of the 60 -70s.
now, I recall, that a precision approach was defined as within 30deg of r/way caentreline (QDM?) where the touchdown point could be defined - and that gave you BOH. A non-precision approach left you with MDH, and, interestingly or not, you were allowed a dirty dart down to this height as soon as you had passed the gate.
mixed up in this was the circling minima, to convert the approach to a circuit.
there was a time when a Dominant obstacle allowance was added to an aircraft approach limitation, and maybe an extra 50ft for granny to give you something else that you kept a secret.
if really bored, do a PD to Alconbury.
The correct answer was, 30 sec to break or 200ft to land.
wets
Last edited by Wetstart Dryrun; 17th Aug 2015 at 17:39.
Reason: not that wet