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Lesson Plan: Portland Observatory - Signals

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Signals at the Portland Observatory

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Signals at the Portland Observatory / Maine Historical Society

This is a watercolor painting that Captain Moody created to show Portlanders the different signal flags used at the Observatory.
According to the flags Moody has raised on the Observatory what types vessels are entering Portland harbor?
How many different types of vessels does Moody have flags for?
Compare this painting to a modern photograph of the Portland Observatory.
How are they different?
How are they the same?
Why do you think the images of the Observatory and surrounding land are not exactly the same?


Item 1 of 4