Quote: During my JAA IR I was told to add 50' on top of the DA for an ILS which I never understood. Unquote..Yet, in a Cat3A ILS where the DH is 50 feet, do you now have to add another 50 ft to ensure you don't go below 50 ft agl? The Boeing 737 FCTM states it is possible the wheels will touch the runway if an automatic GA is made at the DH of 50 feet. So obviously there is no problem if the wheels do touch on a GA. So it seems a bit superfluous that your JAR testing officer says add 50 ft to the normal ILS DH for an ILS GA. Methinks the testing officer is adding personal opinion rather than hard data?