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He should be able to take an observation with the theodolite. He should be able to work out a meridian altitude observation. He could advantageously add to his knowledge the ability to work out a longitude observation or an ex-meridian altitude. He should know how to read the sledgemeter.
He should be able to work out a meridian altitude observation. He could advantageously add to his knowledge the ability to work out a longitude observation or an ex-meridian altitude. He should know how to read the sledgemeter. He should note and remember the error of the watch he carries and the rate which is ascertained for it from time to time.
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