▁the ▁United ▁States ▁J oint ▁Inter ag ency ▁Task ▁Force ▁South , ▁which ▁attempts ▁to ▁counter ▁drug ▁tra ff ick ing , ▁people ▁sm ugg ling ▁and ▁pi racy ▁in ▁the ▁region . ▁Cor ner ▁Brook ▁returned ▁to ▁Hal if ax ▁in ▁May . ▁ ▁In ▁January ▁ 2 0 0 9 , ▁Cor ner ▁Brook ▁was ▁the ▁' target ' ▁for ▁sub marine ▁detection ▁exer cis es ▁performed ▁by ▁ ▁and ▁. ▁This ▁was ▁followed ▁by ▁a ▁four - week , ▁multi - ship ▁training ▁exercise ▁in ▁the ▁North ▁Atlantic ▁during ▁February ▁and ▁March , ▁then ▁participation ▁in ▁the ▁UN IT AS ▁mult in ational ▁exercise ▁off ▁Florida ▁during ▁late ▁April ▁and ▁early ▁May . ▁During ▁August , ▁the ▁sub marine ▁was ▁involved ▁in ▁Operation ▁N ano ok ▁ 2 0 0 9 ▁conduct ing ▁cover t ▁surve ill ance ▁pat rol s ▁in ▁the ▁vic inity ▁of ▁B aff in ▁Island . ▁ ▁Early ▁in ▁ 2 0 1 1 , ▁Cor ner ▁Brook ▁took ▁part ▁in ▁Operation ▁Car ib be , ▁before ▁trans iting ▁to ▁the ▁west ▁coast ▁as ▁part ▁of ▁her ▁re deploy ment ▁to ▁Es qu im alt , ▁British ▁Columbia . ▁On ▁ 4 ▁June ▁ 2 0 1 1 ▁the ▁sub marine ▁ran ▁a ground ▁in ▁No ot ka ▁Sound ▁during ▁man oe uv res ▁off ▁V ancouver ▁Island . ▁The ▁sub marine ▁coll ided ▁with ▁the ▁sea ▁floor ▁in ▁ ▁of ▁water ▁while ▁trav elling ▁at ▁a ▁speed ▁of ▁. ▁The ▁collision ▁opened ▁a ▁