Welcome to the new look of the ISMA Website!

Lake Superior water level up 8 inches over last year

The International Shipmasters Association is a voluntary organiztion of dues-paying licensed professional mariners and others associated with the vessel industry. Our association's roots extend to 1883.

Our Mission

• To be the respected voice of licensed professional mariners in matters related to navigation and safety on waters of the Great Lakes and St. Lawrence Seaway System. In this process, we work with, and provide input to, regulatory agencies, legislative bodies, industry associations and other working groups on matters affecting navigational safety.


• To provide opportunities for licensed merchant mariners to network, to offer their feedback, and to enhance their knowledge in a variety of ways.


• To maintain mutual respect, support, and encouragement among our members, and to promote the pursuit of personal and professional excellence.


• To encourge and assist those preparing for careers as merchant marine officers.