DUCT KEEL JOURNEY : To balance the bilge pipe for MV Pernas Arang Hatch # 4
Sketch on Duct Keel lay out
Main entrance: Main Hole (more than 100 mtrs deep)
Duct keel : more than 50 mtrs squat to the blank exchange valve
GP Asri tightened the stbd blank pipe
Port blank pipe
Hatch No 4 is being used as ballast tank
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