The National Marine Representatives Association said it achieved record growth by adding 30 new members in 2017.
The group said the growth reflects increased awareness by manufacturers of the benefits of using independent sales reps, as well as the overall rebound of the industry.
"We're pleased to welcome this diverse group of new members," NMRA president Neal Trombley said in a statement.
Founded in 1960, the NMRA serves independent marine sales representatives and the manufacturers who sell through reps. It functions as an industry voice, networking tool and information source.
It annually awards one or more scholarships to students who are pursuing an education in the maritime trades.