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