Originally Posted by HEATHROW DIRECTOR
Farmer1.... Why would QNE be used offshore instead of QNH as it complicates matters? The pressure on the surface rarely becomes so high or low that it would be outside the subscale of most altimeters.
When I worked up in the Shetlands (Oil boom - mid 80's) there were times when pressures were as low as 942mb. Most altimeters stop at 950mb