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 ?