Multiple Radar scanners — location requirements
For SOLAS approved installations only one Radar scanner should be connected to a single display.
Radar Multiple scannersRadar Scanners should be mounted so that they are aligned vertically, one directly above the other, separated by at least 2 m (6.6 ft).
Multiple scanners should be mounted in a way that minimizes interference between the vertical beamwidths of the 2 scanners.
In all cases, you should aim to achieve as much physical separation as possible, to minimize any potential interference.
If the Radar scanners can’t be aligned one directly above the other, locate each scanner the same distance from the bow of the vessel. Interference is more likely if the scanners are installed one in front of the other, even when separated vertically.
If two radar scanners are installed at different locations in a dual radar system, care should be taken to allow for the difference in position of the Radar scanners when switching between the two on your display. This is especially noticeable at short ranges on larger vessels.