With all due respect, the statement that the MCA Yachtmaster cert is not valid on commercial vessels is incorrect. Visiting the RYA web site
http://www.ryatraining.org/professio...dorsements.htm I noted that the MCA (UK equivalent of the US Coast Guard) recognizes Yachtmastster commercial endorsements (including STCW) on British flagged vessels. This puts a commercially endorsed MCA Yachtmaster ticket on par with my USCG Merchant Marine 100GT Master's license, unless I'm missing something here? Best, Steve.