▁was ▁employed , ▁using ▁air ▁v ents ▁on ▁the ▁top ▁deck , ▁but ▁a ▁tim ed ▁f use ▁was ▁used ▁rather ▁than ▁inc endi ary ▁gr en ades . ▁The ▁resulting ▁explos ion ▁lifted ▁a ▁ 1 - ton ▁h atch ▁ 3 0 0 ▁feet ▁into ▁the ▁air . ▁Upon ▁ign ition , ▁the ▁remaining ▁Japanese ▁were ▁killed ; ▁the ▁fl amm able ▁mixture ▁kept ▁a ▁fire ▁burning ▁in ▁the ▁fort ▁for ▁several ▁days . ▁ ▁It ▁was ▁five ▁days ▁before ▁the ▁for tr ess ▁could ▁finally ▁be ▁exam ined . ▁With ▁the ▁Man ila ▁Bay ▁for ts ▁neutral ized , ▁including ▁Fort ▁Dr um , ▁Japanese ▁resistance ▁in ▁the ▁Bay ▁area ▁ended . ▁ ▁Pres ent ▁status ▁The ▁ru ins ▁of ▁Fort ▁Dr um , ▁including ▁its ▁disabled ▁tur rets ▁and ▁ ▁guns , ▁remain ▁at ▁the ▁mouth ▁of ▁Man ila ▁Bay , ▁abandoned ▁since ▁World ▁War ▁II . ▁In ▁the ▁ 1 9 7 0 s , ▁lo ot ers ▁started ▁removing ▁sc rap ▁metal ▁inside ▁the ▁fort ▁for ▁res ale . ▁The ▁activity ▁is ▁on going ▁according ▁to ▁a ▁report ▁in ▁ 2 0 0 9 . ▁ ▁An ▁autom ated ▁light ▁was ▁recently ▁installed ▁by ▁the ▁Philipp ine ▁Coast ▁Guard ▁on ▁the ▁top ▁deck ▁for ▁gu iding ▁ships ▁entering ▁the ▁South ▁Channel ▁of ▁Man ila ▁Bay . ▁ ▁See ▁also ▁▁ ▁Har bor ▁Def enses ▁of ▁Man ila ▁and ▁Sub ic ▁B ays ▁ ▁Se aco ast ▁defense ▁in ▁the ▁United ▁States ▁ ▁United ▁States ▁Army ▁Coast ▁Art