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Chip Log, Navigational Tool

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Title: Chip Log, Navigational Tool

Caption: Colorized drawing of a chip log and hour glass timer. This is a navigation tool used by mariners to estimate the speed of a vessel through water. A chip log consists of a wooden board attached to a line (the log-line). The log-line has a number of knots tied in it at uniform spacings. The log-line is wound on a reel to allow it to be paid out easily in use. Originally, the distance between marks was 7 fathoms or 42 feet used with a sandglass with a 30 second running time. Later the distance was refined to 47 feet, 3 inches for a standard glass of 28 seconds.

Credit: Album / Science Source

Releases: ? Model Release: No - ? Property Release: No
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Image size: 3600 × 4590 px | 47.3 MB

Print size: 30.5 × 38.9 cm | 1417.3 × 1807.1 in (300 dpi)

Keywords: ART • ARTWORK • BOARD • CHIP • COLORIZED • COMMON • DEVICE • DRAWING • ENHANCED • GENERAL • HAND • HISTORIC • HISTORICAL • HISTORY • HOUR-GLASS • HOURGLASS • ILLUSTRATION • ILLUSTRATIONS • ILUSTRATION • INSTRUMENT • LOG • MARITIME • MEASUREMENT • MEASURING • NAUTICAL • NAVIGATION • NAVIGATIONAL • NAVIGATORS • SANDGLASS • SHIP • SHIPS BOW • SHIPS • SPEED • TIME: HOURGLASS • TOOL • WOODEN