Image from page 331 of “Science of the sea. An elementary handbook of practical oceanography for travellers, sailors, and yachtsmen” (1912) by Internet Archive Book Images

Identifier: scienceofseaele00chal
Title: Science of the sea. An elementary handbook of practical oceanography for travellers, sailors, and yachtsmen
Year: 1912 (1910s)
Authors: Challenger Society Fowler, G. Herbert (George Herbert), 1861-1940
Subjects: Oceanography Ocean
Publisher: London, John Murray
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Biodiversity Heritage Library

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Text Appearing After Image:
Fig. 196.—Small Nipper Fig. 197.—Small Nipper Rendering. Gripping. (Figs. 195 to 197 by permission of Messrs. Bullivant.) A recording sheave (odometer) of some kind is neces-sary for work in deep water. This need only consistof a strong sheave of known circumference (1 or | SOUNDING 277 fathom), to the spindle of which is affixed an ordinaryengine-room counter. For working heavy vertical ormid-water nets this sheave may be bolted to the deck,but for work of a lighter character it may be slungfrom a davit in place of the ordinary snatchblock. Ifnecessary a single turn of the wire may be taken rightround the sheave, but this tends to chafe strandedwire. For bottom trawling the recording sheave isscarcely necessary, A sufficiently good estimate of theamount of warp paid out can always be made by eyeor by counting the revolutions of the drum, makingallowance for the thickness of a heavy wire, if appreci-able in comparison with the sheave. All rollers and sheaves should be brass-bushed

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About davidfratantoni

David Fratantoni is an engineer, oceanographer, and innovator. As a scientist for 18 years at the Woods Hole Oceanographic Institution, my research emphasized in-situ and remote measurement of ocean circulation and the exploration of relationships between ocean physics and biology. As founder and principal investigator of the Autonomous Systems Laboratory, I conducted pioneering research on eddies in the western Atlantic and Indian Oceans, contributed to the development and novel application of underwater gliders and other mobile autonomous platforms, and developed instrumentation and strategies for sustained ocean observations. At Horizon Marine I served as Chief Technology Officer. The company provides oceanographic expertise, in-situ and remote ocean observations, and detailed environmental forecasting to the global offshore energy industry. My role was to lead research and development of new and existing products, provide oceanographic expertise, and contribute to development of novel business strategies.
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