Number of HF radios required for NAT?
My MEL states one HF radio may be inop while conducting
operations that require two LRCS provided.........
As we donīt have SATCOM as a backup I would like to know the required number of HF radios for a typical NAT crossing(Shanwick OCA, Gander OCA). Does somebody have the regulation/source of the requirement? Can somebody post it?
I found only a general description in the MNPS manual stating
The carriage of HF communications equipment is mandatory for flight in the Shanwick
OCA. Aircraft with only functioning VHF communications equipment should plan their route outside the
Shanwick OCA and ensure that they remain within VHF coverage of appropriate ground stations throughout
the flight.. Details of communication requirements are published in State AIPs and ICAO publications
and
HF communication is mandatory in Shanwick OCA. Most routes require 2 long range
communications systems. Some operators are allowed SATCOM as a substitute for one HF system. VHF
communications (freq 123.45 or 121.5) can be used as to relay air-ground ATS communications as backup in
case of en route HF failure.
Brgds, Walter