RHOTHETA User Manual RT-800
Page 165 of 192
Fig. 170 Example of optimal antenna position
8.3 Line of Sight and Fresnel Zone
There must be a direct line of sight between the transmitter (ship) and the antenna unit.
Furthermore, the fresnel zone must be free of any obstacles.
Fig. 171 Line of Sight and Fresnel Zone
In case of obstacles within the fresnel zone, the direct RF-signal is weakened, and possible
reflections will be noticeable.