'Sailors can use a basic sextant to measure this at local noon, then check navigation tables to calculate latitude'
the altitude of the sun
MEASURE THIS, TREBEK!: Sailors can use a basic sextant to measure this at local noon, then check navigation tables to calculate latitude
Sailors can use a basic sextant to measure this at local noon, then check navigation tables to calculate latitude
Sailors can use a basic sextant to measure this at local noon, then check navigation tables to calculate latitude
MEASURE THIS, TREBEK!
the altitude of the sun
MEASURE THIS, TREBEK!