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Old 15th Apr 2013, 17:06
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cyrilroy21
 
Join Date: Jun 2007
Location: Cochin VOCI , India
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Hey guys help with this question please

The approximate range of a 10 KW NDB over the sea is

a) 500nm
b) 1000nm
c) 50nm
d) 100nm

Option d 100nm is supposed to be the correct answer

I used the formula 3 (over the sea ) X Sqrt ( 10,000 Watts ) = 300nm

Anybody know how 100nm is the supposed to be the correct answer ?
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