O gosh, I had missread.
A Cadet is between the age of 12 to about 18. For most, it is the first step in a career with the Canadian Forces. Most move into the Reserves and some into the Reguler Force. When you apply for any of the two, your training as a Cadet will make things easier then someone with non at all. Now to get to where I missread. Ocdt stands for Officer Cadet, this is an Officer in a Cadet Corp.
I hope this helps this time. I recently had open heart surgery and sometimes don't think straight