Astronomical and navigational instruments, Course, speed and distance indicators

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Higginson's Log

NAV0730
Astronomical and navigational instruments

Object connections:

Collection Astronomical and navigational instruments, Course, speed and distance indicators
User collections The Board of Longitude by Richard_Dunn
Gallery locationNot on display
Peoplemaker: Higginson, John

Object details:

Object ID NAV0730
Description This is one of a number of instruments to measure a ship’s speed through the water. In this design, the log uses a spring balance held with the outer tube to record the pull of a rope attached to a log trailed behind the ship. As the inner rod is pulled out it exposes a scale which indicates the ship’s speed. The scale is marked ‘MILES’ and is calibrated from 0 to 16 in eighths of a mile. The design was submitted to the Board of Longitude for testing in 1828. The top of the main tube has the words ‘Higginson’s Log’ inscribed on it. The tube is held on a pivoted stand with screw holes for attaching it to a ship rail.
Date made 1828

Artist/Maker Higginson
Place made England
Credit National Maritime Museum, Greenwich, London.
Materials brass
Measurements Overall: 75 mm x 540 mm x 175 mm x 2.3 kg
Parts
  • Higginson's Log (NAV0730)
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