Towing endorsements include Master, Mate (Pilot), and Apprentice Mate (steersman) of Towing. When issued without a tonnage limitation these endorsements apply to seagoing tugs of less than 300 GRT; OR to any size tug working exclusively on inland waters. In short this article focuses on the quickest and easiest path from deckhand to Master of Towing by identifying the sea service benchmarks.