Direction and Bearings

Basic Concepts of Direction

Understanding direction is essential for reading maps and navigating. Directions are usually given using compass points:

• Cardinal directions: North (N), East (E), South (S), West (W)
• Intercardinal directions: Northeast (NE), Southeast (SE), Southwest (SW), Northwest (NW)

These eight main points divide the compass into equal parts and help describe location or movement. For example, if a town lies northeast of another, it is roughly halfway between north and east.

A compass rose on maps shows these points, helping you orient yourself. When using a compass, the needle points to magnetic north, which is close to true north but can differ slightly depending on location.

You can also use these directions to describe routes, e.g., "Walk north for 2 km, then turn east."

Understanding Bearings

Bearings are a more precise way to describe direction. They are measured in degrees clockwise from north, which is always 0\degree{} or 360\degree{}.

A bearing is always given as a three-digit number between 000\degree{} and 360\degree{}. For example:

• North is 000\degree{} or 360\degree{}
• East is 090\degree{}
• South is 180\degree{}
• West is 270\degree{}
• Northeast is 045\degree{}
• Southwest is 225\degree{}

Bearings give exact directions, which is especially useful for navigation and plotting routes on maps.

To measure a bearing, start at north (0\degree{}) and move clockwise to the direction you want to find. For example, if a feature lies halfway between east and south, its bearing is 135\degree{}.

Bearings are always measured clockwise, never anticlockwise.

For instance, if a ship is sailing from a port directly east, its bearing is 090\degree{}. If it then changes course to the southeast, the bearing is 135\degree{}.

Using Bearings on Maps

Bearings are used to find directions between points on a map. To plot or measure a bearing:

1. Place the centre of a protractor on the point you are measuring from.
2. Align the 0\degree{} mark on the protractor with the north line on the map (usually the top of the map).
3. Read the bearing clockwise to the other point or feature.

You can also use a compass to help with bearings in the field, aligning it with map features and the magnetic needle.

Calculating direction between two points involves drawing a straight line between them and measuring the bearing from the start point to the end point.

For example, if you want to find the bearing from a village to a nearby hill on a map, you draw a line between them and use a protractor to measure the angle clockwise from north.

Example: If the line from point A to point B is measured at 070\degree{} clockwise from north, the bearing from A to B is 070\degree{}.

For instance, if point M lies halfway between east and south, its bearing from a reference point is 135\degree{} (halfway between 090\degree{} and 180\degree{}).

Practical Applications

Bearings and directions are vital for navigation, whether in the countryside, at sea, or in urban areas. They help:

• Route planning: Choosing the best path between locations by following specific bearings.
• Using compasses: Navigators use bearings to maintain direction when landmarks are not visible.
• Interpreting map features: Bearings relate to map symbols and features, helping to identify locations and plan journeys.

For example, a hiker might use a map and compass to follow a bearing of 060\degree{} to reach a summit, ensuring they stay on course even if the path is unclear.

Example: A cyclist wants to travel from Town A to Town B. The bearing from A to B is 110\degree{}. The cyclist uses a compass to maintain this direction, adjusting as needed to follow the route accurately.