If you try to fly an RN pilot/obs/ACMN above 90 kts... he'll disintegrate into his constituent molecules due to G-force intolerance.
(And please don't bring up Navy Harriers in JFH - we all know they're RAF GR7/9s flown by RAF pilots who joined the RAF, and future-RAF pilots who may have joined the RN at some point in the past)