Navigation+Tools+Steven+Maler

A compass is a thing that always points north and is handy for traveling, mapmaking, and sailing.

^Columbus used a compass like this one to navigate the ocean.

>Columbus used a mariner's astrolabe.

A mariner's astrolabe is a thing that measures the height of the stars at one time, and then compared with the height of the stars a while later determines the ship's position.

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