What Is a Master Mariner?

A master mariner is a licensed mariner who holds the highest grade of seafarer qualification; namely, an unlimited master's license. Such a license is labelled unlimited because it has no limits on the tonnage, power, or geographic location of the vessel that the holder of the license is allowed to serve upon.

What is the difference between master mariner and captain?

A person who possesses the qualification of a master mariner can be the captain of any ship of any size in any part of the globe. Ship captains, on the other hand are restricted by vessel size and therefore can be captains in only limited and specified areas.

Is a master mariner a captain?

Master-Mariners

A master-mariner is a man judged to be qualified to be in charge of a vessel, and is frequently referred to in non-official sources as a captain.