Preparation time for SCI GME exam of 2016 and syllabus.

Is one year of preparation sufficient for SCI GME 2016?? If yes then what are the subjects or topics which I must study for the online test? I'm a Mechanical Engineering student, graduating on May'15. And I'm totally new to this field. And honestly I chose merchant navy because of its job and not due to its salary.. I just want to sail in blue endless sea. Thank...
MERCHANT NAVY FORUMCAREER IN MERCHANT NAVY