Alaskan Submarine Cables: A Struggle with a Harsh Environment

Аннотация

Reviews the laying, repair and maintenance of telegraph and cable systems, at one time 86 submarine cables, between Puget Sound and Alaska 1901-60. Failures due to entanglement by whales, bruising and mauling by anchors and fishing trawls and various destructive effects of geologic agents on the sea floor are noted. In straits on the continental shelf and upper continental slope, cable failures are attributed primarily to chafe by bottom currents and, off the mouths of major streams, to turbidity currents and gravitational slides. Cable repair data for 1903-58 are tabulated, showing reported causes. Some cables at depths of 1000-1500 fathoms on the continental margin cross at least 40 major canyons, but have never failed because of turbidity currents; this indicates a lapse of 2000, possibly 5000 yr since such currents occurred in this region.