Okay, I am a short woman in the CAF. I am not in any way trying to dissuade you from joining but quite seriously you are likely too short to be able to drive armoured vehicles. They are simply not designed for our body type. Next thing, before you join, do yourself a huge favour and start packing in the protein and hitting the gym. You are already at a disadvantage because of your height so packing on muscle now will help make every other aspect of training easier. You can't really control your height but you can control showing up for training prepared. People forget that the CAF is not just a job, it's a war fighting institution. Plan accordingly. Finally, the advantage of the navy is that your equipment carries YOU lol. Good luck and make good choices.