I've had my USCG 100 Ton near coastal for many years (8 1/2). I now live out of the country and own my own shop and dive boats. I've never had to "self-certify" my sea time before because I always worked for someone else. My license is going to expire in about 18 months, so I need to find out what I need to do to document sea time. I have my STCW 95 endorsement and my Merchant mariner's document, but I heard there is an additional endorsement necessary (starting in the near future). What do I have to do to renew? Thanks!