scottbill is correct about the ''dirty dive''...though I haven't heard that expression used on my side of the atlantic. we call it the duckunder.
it is hard to train for this situation. it requires great cockpit discipline to handle.
all of those fancy gadgets are great...but if they aren't installed, it is up to the pilot.
if anyone ever gets the procedures used by this airline (airline contracted) it would be interesting to know the written procedures for this approach.