Question

need help

10. A boat is equipped with a VHF marine radio, which it uses to communicate with other nearby boats and shore stations. If the antenna on the boat is 2.3 m above the water, calculate the maximum distance for communication with a) another similar boat b) a shore station with an antenna on a tower 22 m above the water level e) another boat, but using the shore station as a repeater

Answer 1

Range= 1.25(sqrt(H)+sqrt(h))

where H is height of transmitter in feet, h is height of receiver in feet. Range will be in nautical miles.

2.3m in feet= 7.546ft

a.) R=1.25(sqrt(7.546)+sqrt(7.546))

=6.867nautical miles

b.) 22m =72.178ft

R=1.25(sqrt(72.178)+sqrt(72.178))

=21.24 nautical miles.

c.) 6.867+21.24+6.867

=34.97 nautical miles