Chip log

device · 1574 · Early modern era

A device for measuring a ship’s speed (a log line with knots).

What it is made of

• Rope — has part. On a line with knots.
• Knotted log line — has part. A knotted rope.
• Chip log board — has part. A sector that is slowed by the water.

Principles and materials it uses

• Hourglass — uses. The time of a speed measurement was taken with an hourglass.
• Wood — is made of. A chip log is a wooden board.

Take Chip log apart

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