DaySleeper, Good call.
Dan,
JAR-OPS 1.405 d
(d) Where no outer marker or equivalent
position exists, the commander or the pilot to whom
conduct of the flight has been delegated shall make
the decision to continue or abandon the approach
before descending below 1000 ft above the
aerodrome on the final approach segment. [If the
MDA/H is at or above 1000 ft above the
aerodrome, the operator shall establish a height,
for each approach procedure, below which the
approach shall not be continued if the
RVR/visibility is less than the applicable minima].
And From JAR-OPS 1 Section 2 AMCs and IEMS
IEM OPS 1.405(a)
Commencement and continuation of approach – Equivalent position
See JAR–OPS 1.405(a)
The ‘equivalent position’ mentioned in JAR–OPS 1.405 can be established by means of a DME
distance, a suitably located NDB or VOR, SRE or PAR fix or any other suitable fix that independently
establishes the position of the aeroplane.
IEM = INTERPRETATIVE/
EXPLANATORY MATERIAL
Basically use 1000' above aerodrome level and you are fine, except in Italy as per my earlier post where they ignor JAR-OPS 1.405 and make it up as the go along to trap unwary smelly Englishmen who don't read the Italian AIP daily!