Which of the following is not an advantage of NDB?(a) Inexpensive(b) Omnidirectional(c) Accuracy depends on airborne equipment(d) No mountain and night effectThe question was posed to me by my school teacher while I was bunking the class.My question comes from Point Source Radio Systems topic in portion Terrestrial Radio Navigation System of Avionics

Which of the following is not an advantage of NDB?(a) Inexpensive(b) O

1.	Which of the following is not an advantage of NDB?(a) Inexpensive(b) Omnidirectional(c) Accuracy depends on airborne equipment(d) No mountain and night effectThe question was posed to me by my school teacher while I was bunking the class.My question comes from Point Source Radio Systems topic in portion Terrestrial Radio Navigation System of Avionics
Answer» The CORRECT answer is (d) No mountain and night effect Easiest EXPLANATION: NDB uses ground waves which follow the curvature of earth. They are inexpensive and independent of accuracy issues but suffer from night effect and mountain effect. Mountain effect is the distortion of ground wave in terrain of NONUNIFORM CHARACTER.

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