Types of compass, principles, equipment and components, methods of traverse in compass survey (BLS)
LESSON OBJECTIVE
2.1 Compare types of compass and their principles
2.2.1 Describe terms used in compass survey and the relationship 2.2.2 Classify bearing
2.2.3 Classify reference direction
2.2.4 Classify true meridian
2.2.5 Classify magnetic declination
2.2.6 Classify whole circle bearing
2.2.7 Classify quadratic bearing
2.2.8 Classify local attraction
2.2 Explain use of prismatic compass and its component
2.2.1 Interpret open and close transverse
2.3 Show the methods of traverse in compass survey
2.3.1 Relate the front and back bearing observation
2.3.2 Calculate front and back bearing observation