Remaining within approach RNP could put you low on approach?
Hi everyone,
If you were flying a standard RNAV approach with a requirement RNP of 0.3NM. Let’s say the ANP is less than RNP but for argument sake the ANP is 0.29NM. I can continue the approach as the ANP<RNP of 0.3NM.
This could mean though that the aircraft’s true position is 0.29NM behind where it says it is. If this were true then if you started descent at the FAF you would be descending early given the aircraft’s TRUE position 0.29NM behind where it says it is.
0.29NM is about 100 feet altitude. Surely this could put you dangerously low down the approach and at MDA??