Forum:Marine t-shirt?

I was just wondering if there is some significance to "Marine" t-shirts in Japan outside of One Piece? I've noticed they are worn by many OP characters, but I just noticed one on a character in Suzuka and was curious. Do "Marine" shirts mean something in Japan, or is this possibly a subtle OP reference/tribute?

They're merchandise gimmicks. 06:33, February 20, 2013 (UTC)