I am hoping I can get some help on this topic. Recently the Aussie AIP changed the requirement to check the a/c's altimeter at the outer marker. It used to be that if your altimeter read less than the outer marker check height, you were clear to desecnd to DA, and if the altimeter was high, you added the difference to the DA.
This guidance has dissapeared.
I understand that Australia is/was the only country to do this check. I have heard it was carried out for a few reasons, some being: to check the altimeters accuracy, to check the G/S has not been 'tampered' with and to confirm the receiver is getting the correct lobe.
Our flying school is trying to write some guidance on what to do at the OM check and I would like to find out what the rest of the World is doing.
Can anyone give me the background behind this check, and also tell me what they do at the OM?
Thanks is advance
