Searched here and went through the NMC checklist, I can’t find any information on the “Mate of Towing” I see Apprentice Steersman, but I keep seeing this Mate of Towing to Master of Towing. I am coming up on having enough time to test for 500/1600 Mate near the end of this year. I work on Harbor tugs. So anyone point me in the right direction?