Chatterton, E. Keble (Edward Keble), 1878-1944 · London : Sidgewick & Jackson, litd · leaf 228
with the horizon ) and the upperend of it ( being just with the middle of the sun ), both to agree with the sunne and the horizon at onetime. Observe the same until you see the sun at thehighest and beginning to descend. You have thenfinished.176 THE EARLY TUDOR PERIOD It is not my intention to… … Sj? A Sixteenth-Century Compass Card. of the ships head, and he had the astrolabe and cross-staff for showing him his altitude. But two intenselyimportant data he could not yet obtain accurately :(1) his longitude, and (2) the distance run by the shipin any given time. Very great errors were made…
Ships · Shipbuilding · Navigation
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