canoc

Canoc refers to a type of navigational aid historically used in maritime settings. These devices typically involved a compass integrated with a sighting mechanism. The primary purpose of a Canoc was to allow a navigator to determine their bearing relative to a celestial body or a known landmark. This would then be used in conjunction with other navigational techniques, such as dead reckoning, to establish a ship's position.

While the exact origin and evolution of the term "Canoc" can be somewhat obscure, similar instruments existed across different cultures and time periods. Often, these devices were constructed from durable materials like brass or wood, designed to withstand the harsh conditions of sea travel. The compass component would provide a magnetic heading, while the sighting mechanism, which might involve a movable arm or a peep sight, allowed for precise alignment.

In practice, a navigator would use the Canoc to take a bearing. For instance, they might sight a star or a distant island. By aligning the sighting mechanism with the object and then reading the compass, they could determine the direction of that object from their current location. This information was crucial for plotting courses and understanding the ship's movement across the water. As more advanced navigational tools like the sextant and chronometer became widespread, the use of simpler devices like the Canoc gradually declined. However, they represent an important stage in the development of practical navigation.