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SERVICE PROTRACTOR IN NCC

 SERVICE PROTRACTOR IN NCC

What are the usage of service protector? 

(a) Plot and measure bearing on paper or on a map. For bearing between 0 and 180 degrees their Zero edge must be on the LEFT and for 180 degrees -360 degrees it must be on the RIGHT. 

(b) Measure distance in inches correct unto 1/100th. 

(c) Measure distance in yards, meters or miles on a map by using the appropriate scale. 

(d) For using the diagonal scale one must use an intermediate agent. 

Mark off the distance to be measured on the straight edge of a paper or by means of a divider and then put the paper or divider on the diagonal scale and measure. 

What are the types of compass?

 Compass is of two types as under : -

 (a) Dry Type 

(b) Liquid Type 

What is Global Positioning System (GPS)? 

GPS is a system of satellites and receivers that allows people and devices to pin point their precise location on the earth. The normal GPS operational constellation consists of 24 satellites that orbit the earth in 12 hours. 

What are the usage of GPS? 

(a) Used by fishermen and hikers. 

(b) Used by civilian & para military vehicles to navigate their route. 

(c) Used by defense aircrafts, ships and specialized vehicles.

 (d) Used in defense in battle fields and insurgency-affected areas. 

(e) It assists troops to navigate in thick jungles, mountains and deserts. 

(f) GPS is also used to guide missiles to pre specified targets. 

When is a map is considered to be set? 

A map is said to be set or oriented when it is placed such that it corresponds directly with the ground i.e. when true NORTH on the map points to true NORTH on the ground. 

What are the various methods to find North?

 (a) Watch method. 

(b) By stars 

(c) From Idgah & Mosque 

(d) From Sun 4 

(e) Compass 

(f) GPS

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