Governor R. M. McLane was built in 1884 by
Neafie and Levy at
Philadelphia as the first of two identical steamers, the other being
Governor P. F. Thomas, for the state of Maryland. General characteristics from 1886 registration are for a steel-hulled, steam vessel, official number 85858,
registered length, and depth of . Resistance came from oyster poachers, termed
"oyster pirates" locally, resulting in armed conflicts between vessels that eventually included small cannon.
Governor R. M. McLane replaced the first "Oyster Navy" steamer
Leila in 1884.
Leila had been armed with a 12-pound Dahlgren boat howitzer and engaged in at least one major fight in February 1884 and that weapon may have been transferred to the later steamer that had that type of gun. On 10 December 1888
Governor R. M. McLane, responding to a pirate attack that involved firing on a passenger steamer on the
Chester River was ambushed by a flotilla of pirate boats. The steamer responded by ramming and sinking two boats and taking twenty-four pirates prisoner. Maryland passed an act in 1906 to establish an oyster industry and culture that recognized the need for a complete survey of the natural oyster beds in the state's Chesapeake waters. The issue of existing leases to small oystering operations on natural beds and encouragement of larger operations on much larger leases to be developed by oyster culture depended on accurate mapping of the natural beds and bottom suitable for culture and development of new beds.
Governor R. M. McLane participated in the resulting survey, particularly in the more open waters that weather could make dangerous for the small boats, and in towing the survey houseboat and supporting the survey in general. The steamer was on loan to the Shell Fish Commission during critical seasons. On 21 July 1916 a first meeting between the Maryland Commission and Virginia authorities took place aboard
Governor R. M. McLane in the Potomac River to agree on uniform rules to be enforced by both states. That meeting led to a second meeting August 16, 1917 that also included representatives of the
United States Bureau of Fisheries and
United States Engineers for the Norfolk and Washington districts to continue cooperation and ensure uniform law enforcement on the Potomac. By 1917 the steamer was part of the
Maryland State Fishery Force, successor to the Oyster Police Force, and owned by the
Conservation Commission of Maryland. ==World War I dual service==