Perhaps I was being imprecise.
When I am over foreign parts the Nav Display shows me ICAO coded airfields, when my company sends me a roster they put airfields in IATA. . I want to whip out my netbook and quickly decode the ICAO coding (I know the Jepps will do it for me, but not quickly,) the IATA bit isn't strictly necessary, but is a luxury I have been used to (that is comparing ICAO to IATA.) The clue was in off-line, the company won't give me a satellite connection to search, whilst airborne. I have a windows utility that does that for both ICAO and IATA, but it won't run under WINE on UBUNTU.
Mixture thank you for your efforts, the route you recommend is not unknown to me, indeed it is one I considered, but is not what I am looking for. I assume that you don't know of anything else that would help?