In 1968 the RAAF made a valiant attempt to standardise the name of the yet-to-be-delivered F-111C. It didn't work! The only two names that actually stuck were not even contemplated in this 1968 edict. In service the aeroplane was known as the F One Eleven or more affectionately, The Pig. In USAF service the aeroplane acquired the nickname Aardvark by virtue of its long nose but this name was never used in Australia. The designation itself is often presented incorrectly without a hyphen (F111) or with the hyphen in the wrong place (F1-11). The country that built the aircraft leaves no room for variation. The mission designator F (for Fighter) should be followed by a hyphen and the sequence number (111) with no spaces.

Source: RAAF News September 1968