Originally Posted by Farmer 1
RPS: If you are flying across country, away from other airfields, remaining below the transition altitude, what other pressure are you going to use? The last airfield QNH? What if you fly into a depression, how do you know your safety altitude? If you set the RPS you can guarantee knowing it. Once set, it does not change until the next hour - safe and simple.
If you are going to fly above the transition altitude, then you still need to know your minimum safe altitude. Away from an airfield, you do not know the local pressure, which is why you should use the RPS. You obtain the RPS by asking for it - from the last airfield, or from the FIS.
Even now, in this modern day and age, with gps and all, people still manage to fly into cumulo granite in bad weather.
Chilli, shall we agree to differ? If our paths cross one day I'll give you a friendly wave from above.
Farmer.