A ir ▁Anti - Sub marine ▁Squadron - __ " ▁to ▁" Se a ▁Control ▁Squadron - __ ". ▁The ▁design ation ▁is ▁no ▁longer ▁in ▁active ▁use ▁but ▁is ▁still ▁attached ▁to ▁eleven ▁de activ ated ▁VS ▁squad rons ▁ ▁The ▁table ▁below ▁does ▁not ▁list ▁dis est ab lished ▁squad rons ; ▁it ▁is ▁a ▁list ▁of ▁squad ron ▁design ations ▁which ▁are ▁no ▁longer ▁in ▁active ▁use . ▁Most ▁of ▁the ▁design ations ▁in ▁the ▁table ▁belonged ▁to ▁squad rons ▁which ▁have ▁been ▁dis est ab lished ▁but ▁some ▁belong ▁to ▁squad rons ▁which ▁still ▁exist ▁in ▁an ▁in active ▁status . ▁ ▁Note : ▁The ▁parent het ical ▁( 1 st ), ▁( 2 nd ), ▁( 3 rd ) ▁etc ... ▁app ended ▁to ▁some ▁design ations ▁and ▁the ▁( first ▁use ), ▁( second ▁use ), ▁( third ▁use ) ▁etc ... ▁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 ▁more ▁than ▁once ▁to ▁design ate ▁an ▁Ant is ub marine ▁( or ▁after ▁ 1 9 9 3 , ▁a ▁Sea ▁Control ) ▁squad ron ▁and ▁which ▁use ▁of ▁the ▁design ation ▁is ▁indicated . ▁They ▁are ▁not ▁in ▁series ▁with ▁any ▁VS ▁design ations ▁which ▁existed ▁from ▁ 1 9 2 2 ▁to ▁ 1 9 4 3 ▁to ▁design ate ▁Sc out ing ▁Squad rons . ▁Abs ence ▁indicates ▁that ▁the ▁design ation ▁was ▁used