DUCT KEEL JOURNEY : To balance the bilge pipe for MV Pernas Arang Hatch # 4
![Image](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiixdgr4soxIGQbAaE60dD9Zo_IZ8o4_8eDjR6QexxjNghEh1dNPRUDqj27CxwD2oXZ24cHz62jpDx1U8nMzMa5miyaN5QGYqSc9rYzuG-bfS3sIfUwxgfrK3QQqC5u35N21MgPsLNTUOGY/s640/duct+keel+strches.jpg)
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