driftdown over the indian ocean
hello folks
for those of you more familiar with that area flying along the routes from the middle east to southern india, sri-lanka and the maldives, what is the correct procedure for a driftdown from an operational standpoint taking into consideration that:
aviate first - fly the aircraft, apply rudder, mct, identify, verify, checklist
navigate second - to your drftdown altitude at the driftdown speed: i presume you offset your course laterally ( of how much? 15nm left or right?) first and then you descend ( the higher between your driftdown altitude and the altitude applicable to the course to the enroute alternate basd on the EPT) unless you have a rapid decompression, which in that case you start descending as you turn to the offset!
communicate: inform the atc on the active frequency and the surrounding traffic on the 121.5 emergency frequency about your intentions.
is this the right sequence?
how many nm do you offset your altitude?
if, for instance, the driftdown altitude for the current mass is let's say 26350ft, and you are turning towards mumbai, would the correct procedure call for offsetting your track - in which direction - and then only once established on the offset to descend to the correct altitude - FL260 in our case for a westerly track or you level off at the altitude plus, minus 500ft as over the atlantic? is that portion of the indian ocean rvsm?
many thanks and sorry for the silliness of the question.
baobab72