The monitors took positions against the far marsh in the direction of the arrow, between 900 and 1200 yards from the fort during the following series of attacks: by the MONTAUK, January 27, February 1, and February 28, 1863; and by the PASSAIC, the NAHANT, and the PATAPSCO, March 3, 1863.
Georgia Historical Commission 1963
Plaque courtesy Lat34North.com.
Original page, with additional info, here.
Photo credit: Byron Hooks of Lat34North.com.