National Marine Underwriters, Inc. (NMU), founded in 1983, is a privately held company headquartered in Annapolis, Maryland.

NMU's goal from the beginning has been to be the premier nationwide marketer of complete marine insurance coverage. NMU has been able to establish this mission by specializing in marine insurance for the recreational boater, offering online real-time quotes and focusing on customer service.

NMU has a relationship with over 2,500 independent Agents and Brokers nationwide and is currently underwriting policies through The Northern Assurance Company of America.

With over 25 years experience, NMU is the future of marine insurance.