Defence Minister Manohar Parrikar has indicated that one of the reasons for tipping over of guided missile frigate INS Betwa during undocking at Naval Dockyard in Mumbai could be miscalculation of balance. Mr Parrikar, who has been briefed by Navy Chief Admiral Sunil Lanba, spoke about the importance of centre of gravity. <br/><br/>He explained that when a ship undergoes refit, a lot of machines and fixtures like propeller, engine and others are removed due to which the balance gets disturbed. Speaking at an event in New Delhi yesterday, Mr Parrikar said, there could have been a miscalculation and added that a board of inquiry is on and it will pinpoint the reasons. <br/><br/>Rear Admiral Deepak Bali, Flag-Officer offshore defence advisory group, is heading the board. Mr Parrikar was responding to a question as to whether the INS Betwa accident showed Navy's inability to absorb high technology. <br/><br/>The 3,850-tonne ship, with a length of 126 metres, tipped over while it was being undocked. The mast of the ship hit the dockyard ground. It was docked for repairs and while being returned to water – a process that involves tipping the ship – the system tripped and the ship fell sideways.<br/>