Kamal

Rarity: Common

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At a glance

Class

Notion

Domain

Science and technology

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What Wikipedia says

A kamal, often called simply khashaba (wood in Arabic), is a celestial navigation device that determines latitude. The invention of the kamal allowed for the earliest known latitude sailing, and was thus the earliest step towards the use of quantitative methods in navigation.

Excerpt from the Wikipedia article “Kamal (navigation)”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Bordwall, CC BY-SA 3.0, via Wikimedia Commons.