Understanding Different Types of North in Land Navigation

Discover the distinctions between True North, Grid North, and Magnetic North in land navigation. Learn about the Grid Magnetic Angle and Magnetic Variation, essential concepts for converting bearings on a map. Explore the relevance of these elements in orientation on Ordnance Survey Maps. Visual aids included.

• Land Navigation
• True North
• Grid North
• Magnetic North
• Compass

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1. Uncontrolled copy not subject to amendment Navigation on Land Using Map and Compass Learning Outcome 1 Part 1: Be able to show the different types of North Revision 2.00

2. True, Grid and Magnetic North True 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 North

3. Grid Magnetic Angle It is important to understand the relationship between Magnetic (or Mag) North and Grid North Grid North True North Magnetic North This will become important when we start to convert bearings to and from a map Grid Magnetic Angle (4 )

4. The difference in degrees between Magnetic (or Mag) North and Grid North is referred to as the Grid Magnetic Angle (usually 4 West in UK) Grid North True North Magnetic North Grid Magnetic Angle (4 )

5. Magnetic Variation Grid North The 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) True North Magnetic North Magnetic Variation

6. Magnetic North The three North Poles as shown on an OS map

7. Magnetic North

8. Any questions?