▁standing ▁for ▁' General ▁Re con na issance '. ▁The ▁conversion ▁included ▁the ▁addition ▁of ▁Air - to - Sur face ▁V essel ▁rad ar ▁( AS V ) ▁and ▁a ▁pack ▁of ▁four ▁forward ▁firing ▁ 2 0 ▁mm ▁His p ano ▁can non ▁under ▁the ▁forward ▁bomb ▁bay . ▁Some ▁aircraft ▁were ▁further ▁modified ▁with ▁a ▁pair ▁of ▁stub ▁wings ▁on ▁the ▁fus el age ▁under ▁each ▁wing ▁which ▁carried ▁eight ▁ 3 ▁in ch ▁( 7 6 mm ) ▁" 6 0 ▁p ound " ▁rock ets ▁along ▁with ▁the ▁installation ▁of ▁a ▁Le igh ▁light ▁under ▁the ▁right ▁wing . ▁ ▁The ▁entire ▁series ▁of ▁Liber ator ▁GR . M k . Is ▁were ▁assigned ▁to ▁ 1 5 ▁Group ▁Coast al ▁Command ▁with ▁the ▁reform ing ▁of ▁No . ▁ 1 2 0 ▁Squadron ▁R AF ▁in ▁June ▁ 1 9 4 1 ▁and ▁continued ▁in ▁service ▁until ▁December ▁ 1 9 4 3 . ▁During ▁this ▁time , ▁they ▁account ed ▁for ▁five ▁U - bo ats ▁confirmed ▁s unk ▁and ▁four ▁dam aged . ▁ ▁With ▁the ▁end ▁of ▁the ▁war , ▁the ▁Liber ators ▁in ▁Coast al ▁Command ▁were ▁replaced ▁by ▁the ▁arg u ably ▁inferior ▁mar itime ▁pat rol ▁variant ▁of ▁the ▁Av ro ▁Lanc aster , ▁the ▁GR ▁M k ▁ 3 . ▁ ▁A ircraft ▁ ▁All ▁the ▁aircraft ▁were ▁delivered ▁from ▁March ▁to ▁May ▁ 1 9 4 1 , ▁AM 9 1 1 , ▁AM 9 1 4 ▁and ▁AM