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8 Cards in this Set
- Front
- Back
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what shape is the earth and what can it be considered if viewed in small parts? |
the earth is a sphere, but small parts of it can be considered to be flat |
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when does the curvature of the earth become important? |
when travelling large distances |
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what do we use to state directions? |
bearings |
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what is a bearing? |
a bearing is the horizontal direction of an object from an observer expressed as the clockwise angle from north to the direction of the object |
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what are bearings measured in and what three figures are they given as? |
bearings are measured in degrees as figures from 000 degrees to 360 degrees |
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what is a back bearing or reverse bearing? |
is the bearing of the opposite direction that differs from the bearing by 180 degrees |
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if a bearing is less than 180 degrees, how do you find the back bearing? |
add 180 degrees to the bearing |
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if a bearing is more than 180 degrees, how do you find the back bearing? |
subtract 180 degrees from the bearing |
