Dear aspirant,

No, you cannot join Merchant Navy by studying PCB in high school. To be eligible to join Indian Navy, you have to appear in UPSC NDA examination. You should have passed 12th standard or an equivalent examination with Physics and Mathematics subjects from a Government recognized board to be eligible to appear in NDA examination for joining in Indian Navy. As per the information you have mentioned in your query, you are a PCB student, so, you are not eligible to join Indian Navy.