600 Water St, SW
Washington, DC 20024
Tel: 1-202-484-7170 (in U.S.)
Fax: 1-202-488-0754 (in U.S.)
MSI’s main offices float on the Potomac River at the Gangplank Marina in Southwest Washington, D.C. From the Gangplank Marina parking lot, go to the gate at the Marina Dock Office. Walk down the ramp to the dock and you will see MSI’s numerous gray boats in a row just ahead of you. Our receptionist is located on the boat with the MSI sign.
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Metered parking is available on Water Street, and paid parking is available next door in the Channel Inn underground garage (the Gangplank parking lot is a permit-only lot).
MSI offices are 2-3 blocks from the “Waterfront/SEU” Metro stop on the Green line.
Exit the station, turn right on M Street and walk for one block.
At the light (6th Street SW) cross to the other side of M Street, SW, which curves and becomes Maine Avenue, SW.
Head across the grass on your left and cross Water Street (which runs parallel to Maine Avenue).
Cross the Gangplank Marina parking lot.
Go to the guard house located behind a large metal gate. (not to our Annex office with Odyssey awnings located to the left of the guard house)
Sign in with the guard before proceeding down the docks to the Reception boat.