Slide 1

Uncontrolled copy not subject to amendmentNavigation on Land Using Map and Compass

Learning Outcome 1

Part 1: Be able to show the different types of NorthRevision 2.00True, Grid and Magnetic NorthTrue North and South are at the geographical poles

Grid North is the direction to which all Ordnance Survey Maps are orientated. We take our map bearings using Grid North

Magnetic North is the direction a compass points to and in the UK it is located approximately 4 West of Grid NorthUncontrolled copy not subject to amendmentRevision 1.002Grid Magnetic AngleIt is important to understand the relationship between Magnetic (or Mag) North and Grid North

This will become important when we start to convert bearings to and from a mapGrid NorthTrue NorthMagnetic NorthGrid Magnetic Angle(4)Uncontrolled copy not subject to amendmentRevision 1.003The difference indegrees betweenMagnetic (or Mag) North and Grid North is referred to as the Grid Magnetic Angle (usually 4 West in UK)Grid NorthTrue NorthMagnetic NorthGrid Magnetic Angle(4)Uncontrolled copy not subject to amendmentRevision 1.004Magnetic VariationThe difference in degrees between Magnetic (or Mag) North and True North is referred to as the Magnetic Variation (this is not usually used for navigation)

Grid NorthTrue NorthMagnetic NorthMagnetic VariationUncontrolled copy not subject to amendmentRevision 1.005Magnetic NorthThe three North Poles as shown on an OS map

Uncontrolled copy not subject to amendmentRevision 1.006Magnetic North

Uncontrolled copy not subject to amendmentRevision 1.007Any questions?