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Wire drags, wire sweeps, and sweep bars are used to detect and locate underwater obstructions. These devices came into widespread use in 1900 with sweeps 60-300m long, and later sweeps 3000-4500m long could cover several square kilometers per day. Wire drags have a horizontal bottom wire to locate obstructions, while wire sweeps are similar but faster to deploy for areas with fewer expected obstructions or deeper waters. Sweep bars use structural elements like rails suspended at a set depth, suitable for na

Author

Kath

Language

EN