▁May ▁ 1 9 6 0 ▁the ▁V T ▁design ation ▁was ▁res ur rect ed ▁and ▁existing ▁flying ▁training ▁units ▁were ▁designated ▁" Tra ining ▁Squad rons ▁( V T ) ". ▁There ▁is ▁no ▁relationship ▁between ▁the ▁training ▁squad rons ▁using ▁the ▁V T ▁design ation ▁after ▁ 1 9 6 0 ▁and ▁the ▁Tor ped o ▁or ▁Tor ped o ▁and ▁Bomb ing ▁squad rons ▁of ▁the ▁ 1 9 2 0 s ▁to ▁ 1 9 4 0 s . ▁From ▁ 1 9 2 7 ▁to ▁ 1 9 4 7 ▁training ▁squad rons ▁used ▁the ▁design ation ▁" V N ". ▁From ▁ 1 9 4 7 ▁to ▁ 1 9 6 0 ▁training ▁units ▁were ▁not ▁designated ▁as ▁squad rons , ▁they ▁were ▁" un its " ▁or ▁" groups " ▁called ▁Basic ▁Training ▁Gr oups ▁( B T G ), ▁Advanced ▁Training ▁Units ▁( AT U ), ▁Jet ▁Trans ition ▁Training ▁Units ▁( J TT U ) ▁or ▁Multi ▁Engine ▁Training ▁Gr oups ▁( ME T G ). ▁ ▁Note : ▁The ▁parent het ical ▁( 1 st ) ▁and ▁( 2 nd ) ▁app ended ▁to ▁the ▁V T - 9 ▁design ations ▁in ▁the ▁table ▁below ▁are ▁not ▁a ▁part ▁of ▁the ▁squad ron ▁design ation ▁system . ▁They ▁are ▁added ▁to ▁indicate ▁that ▁the ▁design ation ▁was ▁used ▁twice ▁to ▁design ate ▁two ▁different ▁training ▁squad rons . ▁They ▁are ▁not ▁counted ▁in ▁sequence ▁with ▁the ▁actual ▁first ▁use ▁of ▁the ▁V