C-MAP MAX NA-M026 - Great Lakes & The Maritimes - SD Card [NA-M026SDCARD] Brand_Blue Sea Systems Has same hole pattern as

Has same hole pattern as some older version transducers

even at slow speeds

and 1/4" diameter hinge pin

or 4190 Ratchet Mounts

C-MAP MAX NA-M026 - Great Lakes & The Maritimes - SD Card [NA-M026SDCARD] Brand_Blue Sea Systems Has same hole pattern asNA M026 => Great Lakes, Northeast Coast and Approaches Coverage of the Great Lakes, St. Lawrence River and Northeast United States. Coverage of the Great Lakes also includes Fox River and Lake Winnebago, Lake St. Clair, Rideau Canal, Ottawa River and the Trent Severn Waterway. Includes all coastal charts for New Brunswick and Nova Scotia in Canada and Maine, New Hampshire, Massachusetts, Connecticut and New York in the U. S. Also included is coverage