2350 | |
Hualapai Wash water level gauge. Party of Emmett Sheridan |
Lake Mead, Nevada 1941 |
2351 | |
Wiredrag diagram. The basic principle is to drag a wire attached to two vessels. If the wire encounters an obstruction it will come taut and form a "V" |
1920? |
2352 | |
Wiredrag - engine and guiding roller. Deck of contract sloop NENA A. ROWLAND. Wiredrag party of N. H. Heck |
Block Island Sound, New York 1913 |
2353 | |
Wiredrag - arrangement of deck of guide boat. Deck of contract sloop NENA A. ROWLAND. Wiredrag party of N. H. Heck |
Block Island Sound, New York 1913 |
2354 | |
Wiredrag - plotting table and instruments on guide boat. Deck of contract sloop NENA A. ROWLAND. Wiredrag party of N. H. Heck |
Block Island Sound, New York 1913 |
2355 | |
Wiredrag - N. H. Heck watching the brake to stop reel. Reel stopped to attach floats and buoys to mark wire location. Deck of contract sloop NENA A. ROWLAND. Wiredrag party of N. H. Heck. Only known photograph of Nicholas Heck in the field |
Block Island Sound, New York 1913 |
2356 | |
Diagram of obstructions discovered by wiredrag. Wiredrag party of J. H. Hawley |
Massachusetts Bay, Massachusetts 1915 |
2357 | |
Wiredrag vessels in Massachusetts Bay party. Guide launch pilot; end launch Two Brothers; large tender at buoy. Wiredrag party of J. H. Hawley |
Massachusetts Bay, Massachusetts 1915 |
2358 | |
Watching the wire coming in. Working in approaches to Boston Harbor. Wiredrag party of N. H. Heck |
Approaches to Boston Harbor 1915 |
2359 | |
Stowage of wiredrag equipment. Working in approaches to Boston Harbor. Wiredrag party of N. H. Heck |
1915 |
2360 | |
Guide launch FORTUNA setting out the drag. Working in approaches to Boston Harbor. Wiredrag party of N. H. Heck |
1915 |
2361 | |
Taking up the drag on the EQUATOR. Wiredrag party of J. A. Daniels |
Clarence Strait, Southeast Alaska 1916 |
2362 | |
Setting out the large buoy. Wiredrag party of J. A. Daniels |
Clarence Strait, Southeast Alaska 1916 |
2363 | |
Wiredrag problems - buoys on wire crushed by being pulled under by tides. Wiredrag party of J. A. Daniels |
Clarence Strait, Southeast Alaska 1916 |
2364 | |
Wiredrag problems - removing kelp from the wire. |
Maine |
2365 | |
Setting a floating signal to help navigate wiredrag operations. Wiredrag party of J. H. Hawley |
Florida Keys 1917 |
2366 | |
Contract wiredrag launch TWILIGHT. First view without wiredrag gear - second with wiredrag gear installed. Semaphore signalling device installed on second picture |
Florida Keys 1917 |
2367 | |
Wiredrag contract launch ROOSEVELT. Drafting table and shelter for plotting sheet installed. Wiredrag party of A. Joachims |
Vicinity of Petersburg, Alaska 1917 |
2368 | |
Wiredrag problems - buoys crushed by water pressure. Buoys carried under by strong tidal currents in the Race. Wiredrag party of R. P. Strough |
Block Island area, Connecticut 1917 |
2369 | |
End launch STANDARD equipped for wiredrag work. Wiredrag party of R. P. Strough |
Block Island area, Connecticut 1917 |
2370 | |
Setting out the drag from the guide launch PILOT. Wiredrag party of R. P. Strough |
Block Island area, Connecticut 1917 |
2371 | |
Guide launch PILOT showing drag gear. Wiredrag party of R. P. Strough |
Block Island area, Connecticut 1917 |
2372 | |
Setting out the drag and buoys from the guide launch. Note semaphore signaling device on stern. Wiredrag party of J. H. Hawley |
Maine coast 1918 |
2373 | |
Drowned forest discovered by wiredrag on Lake Washington. Pulling up a moderate size tree. Wiredrag party of N. H. Heck |
Lake Washington, Washington 1920 |
2374 | |
Wiredrag using oar power. Note third boat at distant right. Wiredrag party off of SURVEYOR |
Baranof Island, Southeast Alaska 1925 |
2375 | |
Wiredrag hung up on obstruction at buoy no. 4. Note "V" of buoy path characteristic of obstruction discovery. Wiredrag party off of EXPLORER |
Klawak, Southeast Alaska 1927 |
2376 | |
Newspaper feature on wiredrag in Brooklyn Daily Eagle. Wiredrag party of B. H. Rigg |
Long Island Sound, New York 1931 |
2377 | |
Drag tester - Mate Franz Okeson on right. Wiredrag party of B. H. Rigg |
Long Island Sound, New York 1931 |
2378 | |
C&GS Launch 66 - wiredrag tender in Long Island Sound. Mate Franz Okeson facing camera on right |
Long Island Sound, New York 1931 |
2379 | |
Wiredrag at Mitchell-Jordan Reservoir. Site for seaplane ferrying landing site . Wiredrag party of Max Ricketts |
Alabama 1942 |
2380 | |
Some tools of the trade - wiredrag at Mitchell-Jordan Reservoir. Sextants for shooting horizontal angles, 3-arm protractor for plotting positions . Wiredrag party of Max Ricketts |
Alabama 1942 |
2381 | |
Wiredrag operations at Elephant Butte Reservoir for seaplane landing site. Wiredrag party of Max Ricketts |
Elephant Butte Reservoir, New Mexico 1942 |
2382 | |
Leadline sounding during wiredrag operations. Wiredrag party of Max Ricketts |
Elephant Butte Reservoir, New Mexico 1942 |
2383 | |
Wiredrag gear on the stern of the LESTER JONES. |
|
2384 | |
Buoys crushed from being swept under by tidal currents. Operations on the LESTER JONES |
|
2385 | |
Current meter being deployed. Operations on the LESTER JONES |
|
2386 | |
Wiredrag operations on the LESTER JONES. |
|
2387 | |
Launch wiredrag operations. L to r - guide launch, tender, end launch. Launches off of PATHFINDER |
Guemes Channel, Anacortes, Washington 1958 |
2388 | |
Diagram of wiredrag operations ca. 1980. Basically the same system as devised in the early Twentieth Century |
|
2389 | |
Chain drag operation - hung up on obstruction. Launches off of PEIRCE |
Delaware Bay 1985 |
2390 | |
Pole signal with tin cone for reflecting sunlight. Constructed by survey crews under direction of Ferdinand Hassler. Sketch by Assistant John Farley - view looking to south across Long Island Sound |
Connecticut shore 1837 |
2391 | |
Tripod signal with tin cone for reflecting sunlight. At signal West Base, west end of Great Fire Island Base Line. Constructed by survey crews under direction of Ferdinand Hassler. Sketch by Assistant John Farley - view looking to east |
Fire Island, New York 1837? |
2392 | |
Wooden tower within a tower. Outer tower supports personnel - inner tower supports instrument. First devised by Assistant Edmund Blunt to see over marshes in Delaware Bay area |
1855 |
2393 | |
Survey tower with signal pole and tin cone. At west end of Epping Base Line. Survey monument shows below tower. Stakes on graded surface were for aligning base measuring instruments |
Epping Plains, Maine 1857 |
2394 | |
Signal pole with flag and tin cone for reflecting sunlight. Epping Plains area of Maine |
1857 |
2395 | |
Signal at Stillpond, Maryland. Instrument height of 120 feet - top of signal 275 feet. 39th Parallel Survey. Record signal height from wooden tower |
Maryland 1880? |
2396 | |
Field sketch of signal pole on tree stump. Sketch by Cephas Sinclair |
Atchafalaya River, Louisiana 1888 |
2397 | |
129 foot wooden tower at Station Tate. Horse and buggy at lower right corner for scale. Triangulation party of A. T. Mosman |
Clermont County, Ohio 1892 |
2398 | |
Station Tate showing attached signal pole. Top of signal pole is 175 feet above ground. Triangulation party of A. T. Mosman |
Clermont County, Ohio 1892 |
2399 | |
Station Greene, Indiana. Instrument height is 152 feet above ground. 39th Parallel Survey. Triangulation party of George A. Fairfield |
Jennings County, Indiana 1890 |