Quadrant
Quadrants are used to measure the height of celestial objects
above the horizon. This can give the mariner valuable information
about his location even if he cannot see any landmarks.
(left) Nick demonstrates the use of the quadrant, which he used
to measure the height of the moon on successive nights.
(below) Recordkeeping is an important part of our multi-day studies.
Your memory is never as good as you think it is.
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