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Wiredrag
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Coast-Geodetic-Survey
Nautical Charting
Soundings
Wiredrag
Soundings
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
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(247.54 KB)
Wiredrag - engine and guiding roller.Deck of contract sloop NENA A. ROWLAND.Wiredrag party of N. H. Heck
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(523.91 KB)
Wiredrag - arrangement of deck of guide boat.Deck of contract sloop NENA A. ROWLAND.Wiredrag party of N. H. Heck
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(567.05 KB)
Wiredrag - plotting table and instruments on guide boat.Deck of contract sloop NENA A. ROWLAND.Wiredrag party of N. H. Heck
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(513.46 KB)
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
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(351.61 KB)
Diagram of obstructions discovered by wiredrag.Wiredrag party of J. H. Hawley
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(598.88 KB)
Wiredrag vessels in Massachusetts Bay party.Guide launch pilot; end launch Two Brothers; large tender at buoy.Wiredrag party of J. H. Hawley
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(527.16 KB)
Watching the wire coming in.Working in approaches to Boston Harbor.Wiredrag party of N. H. Heck
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(497.83 KB)
Stowage of wiredrag equipment.Working in approaches to Boston Harbor.Wiredrag party of N. H. Heck
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(613.11 KB)
Guide launch FORTUNA setting out the drag.Working in approaches to Boston Harbor.Wiredrag party of N. H. Heck
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(474.37 KB)
Taking up the drag on the EQUATOR.Wiredrag party of J. A. Daniels
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Setting out the large buoy.Wiredrag party of J. A. Daniels
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(538.74 KB)
Wiredrag problems - buoys on wire crushed by being pulled under by tides.Wiredrag party of J. A. Daniels
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(507.87 KB)
Wiredrag problems - removing kelp from the wire.
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(621.77 KB)
Setting a floating signal to help navigate wiredrag operations.Wiredrag party of J. H. Hawley
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(81.68 KB)
Contract wiredrag launch TWILIGHT.First view without wiredrag gear - second with wiredrag gear installed.Semaphore signalling device installed on second picture
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(551.93 KB)
Wiredrag contract launch ROOSEVELT.Drafting table and shelter for plotting sheet installed.Wiredrag party of A. Joachims
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(505.41 KB)
Wiredrag problems - buoys crushed by water pressure.Buoys carried under by strong tidal currents in the Race.Wiredrag party of R. P. Strough
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(591.59 KB)
End launch STANDARD equipped for wiredrag work.Wiredrag party of R. P. Strough
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(650.52 KB)
Setting out the drag from the guide launch PILOT.Wiredrag party of R. P. Strough
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(262.58 KB)
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