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• 12:01, 4 March 2011 Pgrig talk contribs uploaded File:Wetherill-1921-Map-S.jpg (This map was produced by the U.S. Army Engineers, and updated through 1921. It was provided by the Coast Defense Study Group, which copied it from the National Archives and distributed it on DVD. Unfortunately, the original image file is considerably fuzz)
• 19:08, 9 January 2011 Pgrig talk contribs uploaded File:Ft Andrews Aerial 1932.jpg (The file of this image, acquired from the National Archives by the Coast Defense Study Group (CDSG) and distributed by them on disk, is entitled with the year 1932. It was made by the U.S. Army, and is stunning in its detail. It looks northwesterly. At c)
• 13:33, 8 January 2011 Pgrig talk contribs uploaded File:Ft-Heath-AP-c1921-SEly.jpg (This undated photo of Ft. Heath, Winthrop, MA, taken by the U.S. Army, was likely made about 1921, judging from the apparent construction activity near the barracks at center. It looks southeasterly and shows Battery Winthrop at center-left, with its thre)
• 20:24, 5 January 2011 Pgrig talk contribs uploaded File:Ft-Banks-AP-c-1940.jpg (This undated aerial photo, likely made by the U.S. Army in about 1940, looks southeasterly across the mortar pits at Ft. Banks. Btty Kellogg Pit A is at upper left and Btty Lincoln Pit B is at lower right. This photo shows the original height of the eart)
• 15:00, 22 September 2010 Pgrig talk contribs uploaded File:Nahant-Rd-FCT-View-S.jpg (This photo, taken on an overcast day in February, 2010, looks south from the top observation level of the Nahant Road fire control tower. The island just left of center is Outer Brewster Island, about 6 mi. distant. Beyond that are the shores of Hull, MA)
• 20:01, 2 September 2010 Pgrig talk contribs uploaded File:Old-Style-Pit.jpg (This image shows an old-style mortar pit of the Abbot Quad period. Three mortars are shown, and a fourth is likely located just out of frame to the left. Although it appears that only two of the mortars (likely the ones at center and lower left) are invol)
• 15:43, 31 August 2010 Pgrig talk contribs uploaded File:Cushing-A-Firing.jpg (This photo, likely dating to the early 1940s, shows Pit A of Battery Cushing at Ft. Andrews firing one of its M1890 mortars. The photo, likely taken originally by the U.S. Coast Artillery, was reprinted from "The Military History of Boston's Harbor Island)
• 19:28, 30 August 2010 Pgrig talk contribs uploaded File:Aliquot-Load.jpg (This image is a portion of Fig. 45, p. 92, of "TM 9-456: Technical Manual 12-Inch Mortar M1890M1...", (U.S.) War Department, Washington (D.C.), October 17, 1942. It shows a so-called aliquot charge of propellant for the 12-inch coast defense mortar. Alth)
• 18:30, 22 August 2010 Pgrig talk contribs uploaded File:Banks-Obelisk.jpg (This photo, taken in August, 2010, shows what appears to be an obelisk monument, atop the present-day earthen cover to the west of Btty Kellogg, Pit B (and between that pit and Btty Lincoln Pit B). In fact, this structure is apparently a ventilation shaft)
• 15:38, 20 August 2010 Pgrig talk contribs uploaded File:Developmental-Plan-Banks.jpg (This is a portion of the plan view of the two coast defense mortar batteries at Fort Banks, Winthrop, MA. Originally researched and drawn by Thomas Vaughan of the Coast Defense Study Group (and updated through December, 1982), the plan is a portion of a l)
• 20:17, 17 August 2010 Pgrig talk contribs uploaded File:Ft-Duvall-Map-1938.jpg (Map is from the Supplement of the report by the U.S. Army Engineers on the Defenses of Boston Harbor, 1945. The two 16-inch gun positions of Battery Long are clearly visible, as well as the magazines, mechanical spaces, and plotting rooms in the undergrou)
• 14:55, 28 July 2010 Pgrig talk contribs uploaded File:Mine-Control-Panel.jpg (This photo is from "Training Manual TM 2160-20 Submarine Mining," U.S. War Department, Washington, D.C., October 15, 1930, p. 76. It shows a control panel for a group of 19 submarine mines. In modern terms, this would be called a rack-mount module, whic)
• 18:34, 27 July 2010 Pgrig talk contribs uploaded File:Strong-Mines-S.jpg (This plan of the mine casemate at Fort Strong, Long Island, Boston Harbor is extracted from the Reports of Completed Works (RCWs)for that fort by the U.S. Army Engineers. It dates to about 1940. The left-hand (westerly) portion of the casemate housed the)
• 13:50, 27 July 2010 Pgrig talk contribs uploaded File:Mine-and-Box.jpg (This image is taken from Training Manual TM 2160-20, "Submarine Mining," U.S. War Department, Washington, D.C., October 15, 1930, p. 217. It shows a spherical mine (cylindrical ones were also used) tethered to an anchor which kept it at a pre-determined h)
• 20:12, 17 July 2010 Pgrig talk contribs uploaded File:Ft-Strong-Obsolete-Bty.jpg (This plan drawing was part of the January, 1922 Report of Completed Works for Battery Ward at Fort Strong (Long Island, Massachusetts) by the U.S. Army Engineers. Somewhat amazingly, it shows the positions of the obsolete 19th Century cannon battery an)
• 18:39, 13 July 2010 Pgrig talk contribs uploaded File:Ft-Heath-Map-1921.jpg (This map, from the U.S. Army Engineers, is updated through 1921. The curving southwest boundary of the fort apparently followed the present course of Pond Street, Winthrop. The shorter leg running roughly northeast apparently followed Highland Avenue.)
• 16:46, 10 July 2010 Pgrig talk contribs uploaded File:Ft-Ruckman-Map.jpg (This map of Fort Ruckman is from the U.S. Army Engineers' 1945 Report on the Harbor Defenses of Boston, and was meant as an aid to locating the WW2 battery of three anti-aircraft guns NW of the fort (at "Site 2C"). The boundary of the fort is indicated by)
• 17:45, 8 July 2010 Pgrig talk contribs uploaded File:Banks-map-1938.jpg ({{Information |Description={{en|1=1938 map of Ft. Banks shows the four mortar pits of Batteries Lincoln and Kellogg at center. The two northerly "B" pits (see red labels) each (by 1938) contained two mortars, while the southerly "A" pits contained four mo)
• 23:54, 4 July 2010 Pgrig talk contribs uploaded File:Battery-Smyth.jpg (This photo, taken in 2010, looks easterly at Gun Platform #1 (at right) of Battery Smyth, a battery of two 3-inch guns on the eastern side of the island that protected the mine fields planted between Long Island and Hull, along Nantasket Roads, the channe)
• 17:55, 4 July 2010 Pgrig talk contribs uploaded File:Ft Strong Map 1938.jpg (This map, by the U.S. Army Engineers, is updated to show details as of 1938. It names the various gun batteries of the fort, all of which (minus their guns) still exist today (in 2010). The center portion of the fort, between the two roadways, was the pa)
• 12:02, 3 July 2010 Pgrig talk contribs uploaded File:Basinger-CRF.jpg (Photo (from 2010) looks SW at the two-level coincidence range finder (CRF) station of Battery Basinger, a dual 3-inch gun emplacement on the north shore of Long Island in Boston Harbor, part of Fort Strong and the Boston harbor defenses. This bunker was b)
• 15:36, 24 June 2010 Pgrig talk contribs uploaded File:East FC Plan 1904.jpg (Original blueprint of East Side fire control tower, Fort Andrews, Boston Harbor, taken from U.S. Army Engineers, Report of Completed Works, October 1921 (file provided by Coast Defense Study Group as part of Boston Harbor Defenses DVD). Left side drawing)
• 13:48, 24 June 2010 Pgrig talk contribs uploaded File:Directing point.jpg (Drawing obtained from Coast Defense Study Group, as published in "American Seacoast Defenses," Mark Berhow, Ed., CDSG Press, McLean, VA, 2004, p. 259. CDSG confirms drawing is from U.S. Government manual. A two-gun battery is shown, with its directing po)
• 20:13, 24 May 2010 Pgrig talk contribs uploaded File:Fire Control Data Flow.jpg (Image is from "FM 4-15 Coast Artillery Field Manual-Seacoast Artillery Fire Control and Position Finding," U.S. War Department, Government Printing Office, Washington, 1940, p. 282. This copy courtesy of the Coast Defense Study Group, 2010.)
• 15:39, 16 May 2010 Pgrig talk contribs uploaded File:East FC Plan 1904.jpg (A plan of the East Side fire control building, completed in 1904. The second floor plan is on the left, the ground floor on the right. In the style of the 1900-1920 period, a thick octagonal concrete pillar ran from well underground up to the second floor)
• 17:20, 13 May 2010 Pgrig talk contribs uploaded File:DPF Angles.jpg (Diagram is taken from "FM 4-15: Coast Artillery Field Manual, Seacoast Artillery Fire Control and Position Finding, War Department, U.S. Government Printing Office, Washington, 1940, p. 8.)
• 19:13, 12 May 2010 Pgrig talk contribs uploaded File:Mine BES.jpg (This concrete pillbox was one of the base end stations that observed for the submarine mine defenses of the southern channels to Boston Harbor. It is located at Ft. Revere in Hull, MA, on land now part of a state park.)
• 13:24, 4 May 2010 User account Pgrig talk contribs was created automatically