Walker's Harpoon Ship Log
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This mechanical log indicates the distance the ship has traveled through the water by recording the number of times the five-fin section of the mechanism rotates. The gauge shows the nautical miles traveled, in hundreds, tens and ones. The log was towed to the stern of the ship and pulled in for readings. While not perfect, the harpoon log was significantly more accurate than the traditional chip and hourglass log. This instrument was patented on September 18, 1866.
Thomas Walker & Son was a British company that patented its first register in 1861.
dimensions: 41x13 cm
This mechanical log indicates the distance the ship has traveled through the water by recording the number of times the five-fin section of the mechanism rotates. The gauge shows the nautical miles traveled, in hundreds, tens and ones. The log was towed to the stern of the ship and pulled in for readings. While not perfect, the harpoon log was significantly more accurate than the traditional chip and hourglass log. This instrument was patented on September 18, 1866. Thomas Walker & Son was a British company that patented its first register in 1861. dimensions: 41x13 cm