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Using a Cross Staff

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Using a Cross Staff.jpg The Rigging of a Three-masted ShipThumbnailsThe Sails of a Four-masted ShipThe Rigging of a Three-masted ShipThumbnailsThe Sails of a Four-masted ShipThe Rigging of a Three-masted ShipThumbnailsThe Sails of a Four-masted ShipThe Rigging of a Three-masted ShipThumbnailsThe Sails of a Four-masted ShipThe Rigging of a Three-masted ShipThumbnailsThe Sails of a Four-masted ShipThe Rigging of a Three-masted ShipThumbnailsThe Sails of a Four-masted Ship

This crude instrument was used in an attempt to work out problems in latitude. After holding one end of the staff to the eye and sliding the cross staff along until the observer sighted over one end at the sun and under the other at the horizon, the instrument was placed on a circle marked in degrees, and the angle was determined.