Military unit designation
A naval air squadron (NAS) is the title of naval aviation squadrons in some countries.
Poland
The Polish Morski Dywizjon Lotniczy #Naval Air Squadron# was formed in 1920 with two Escadrilles#
United Kingdom
The squadrons of the Fleet Air Arm are named as "nnnn Naval Air Squadron" where nnnn is a three or four digit number.
See also
References