Log in


Who We Are

The Hydrographic Society of America Inc., also known as THSOA, is a non-profit  professional membership organization, whose main focus is to provide support to its members in the Americas. THSOA is a 501(c)(3) non-profit organization committed to promoting education in offshore survey, positioning and mapping, including hydrography and related earth sciences

THSOA was incorporated in the State of Maryland, United States as a non-profit organization in 1984 and was granted 501(c)(3) status as a non-profit organization by the United States Internal Revenue Service in 1984.

THSOA celebrated its’ 33-year presence in the United States on April 1, 2017. Houston, Southeast, Northeast, Mid West, West Coast, National Capital Region and Latin America, our membership now stands at over 600 members.

On odd numbered years, THSOA hosts the U.S. Hydrographic Conference that draws national and international exhibitors and attendees.

 THSOA National Bylaws.pdf


Our Mission

As a non-profit organization, THSOA is committed to promoting education in hydrography, inshore surveying, inland waters surveying, offshore surveying, positioning and mapping/charting, including related earth sciences.

Our ObjectiveS