The Earth Flashcards by Rafael Schofield | Brainscape

Q

What is the shape of the earth?

A

Ellipsoid.

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Q

What is the circumference of the earth in nm?

A

21,600nm

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Q

What is the circumference of the earth in km?

A

40,000km

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Q

What must you multiply nm by to get km?

A

1.852

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Q

How many minutes in a degree?

A

60

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Q

What is a nautical mile?

A

1 minute around the circumference of the earth.

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Q

What is the diameter at the equator?

A

6888nm

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Q

What is the diameter at the poles?

A

6865nm

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Q

Orient and easter

A

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Q

You always drift from blank to blank.

A

Heading to track

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Q

What is an isogonal?

A

Lines joining points of equal magnetic variation.

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Q

What does agonic mean?

A

Lines joinging points of zero variation.

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Q

What is variation?

A

Difference between true north and magnetic north.

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Q

Whats deviation?

A

Difference between magnetic north and compass north.

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Q

Whats a graticule?

A

Where lines of latitude and longitude meet at 90 degrees.

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