ATIS - Wind direction in True or Mag?
We all know that TAFs and METARS give the surface wind in True. The aircrew in our crewroom are all under the impression that ATIS winds are supposed to be magnetic(cos that's wot we were taught and runways are in mag!) This has recently caused heated discussion with the chaps in ATC who simply copy down the true wind that's passed by the Met Office and put that out on the ATIS.
A trawl through the books finds a quote in JSP 318A (Military ATC Bible) that says that ATCOs are responsible for applying variation to the true wind supplied by the Met Office when choosing a runway direction. We've found nothing yet that explicitly states whether you should use true or mag in the ATIS.
Of course with 4 degrees variation it doesn't really matter here but most of us regularly operate into windy airfields with big variations so we'd like to clear up any confusion!
Any comments