Compass Rose 000 337.5 022.5 315 045 067.5 292.5 270 090 247.5 112.5 225 135 202.5 157.5 180.

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Presentation transcript:

Compass Rose 000 337.5 022.5 315 045 067.5 292.5 270 090 247.5 112.5 225 135 202.5 157.5 180

Draw a line between the points Draw the North line on the first point Bearing of B from A = 060o A How to find a bearing: Draw a line between the points Draw the North line on the first point Measure the angle clockwise from North Write the result as 3 digits (eg 345o or 012o)

Opposite directions are always 180o apart B 180o 60o A Bearing of A from B = 180o + 60o = 240o Opposite directions are always 180o apart

A D B C

Margin of error: Bearings should be correct to within 2 degrees ( ½ a mark for 5 degrees out) Distances need to be correct to within 5 metres ( ½ a mark for 10 metres out)

How to pinpoint a location using bearings Try to work out how bearings could help you locate a ship in distress. N 360° - 275° = 85° N 058° 275° Construct the bearing from each point. Extend the lines until they cross. The crossing point is the location.

A D F B C