Air commodore unification of the Canadian Forces in 1968, when army-type rank titles were adopted. An air commodore then became a brigadier-general (following the US Armed Forces title, rather than the British brigadier, which had been held by equivalent officers in the former Canadian Army). In official French Canadian usage, the rank title was "commodore de l'air". The position of honorary air commodore still exists in the Royal Canadian Air Cadets. Air Commodore, a calque or near-literal translation is also a rank in the Egyptian Air Force, Royal Air Force of Oman, the Royal Thai Air Force and the Air Force of
Future of the Royal Navy although many programmes were reduced in scale. This has led to the replacement of smaller and more numerous units with fewer, but larger, units. The main examples of this are the replacement of twelve Type 42 destroyers with six Type 45s and the replacement of the three 20,000 tonne s with two 70,600 tonne "Queen Elizabeth"-class aircraft carriers. There are, as of November 2018, 13 Royal Navy ships and submarines under construction (A further 5 planned): Four s (boats 4-7), one "Dreadnought"-class ballistic missile submarine (boat 1 of 4), one "Queen Elizabeth"-class aircraft carrier (ship 2 of 2), one Type