Pakistan Submarines or Watercrafts Postage Stamps

Just to show some submarine stamps from Pakistan, here I am uploading these:-

I also remember that some sailing stamps have also been issued by Pakistan. Would try to find them and upload their pictures soon.
Here is a small image of sailing boats issued by Pakistan on becoming Asian Sailing champion in 1999:
and the stamp issued by Pakistan Post at the event of 10th Optimist Sailing Championship in 1999: