GMDSS: Element 3

1. A INMARSAT-C antennas are small and omni-directional, while INMARSAT-B antennas are larger and directional.
2. B INMARSAT-B antennas are bulkier but omni-directional, while INMARSAT-C antennas are smaller and parabolic, for aiming at the satellite.
3. C INMARSAT-B antennas are parabolic and smaller for higher gain, while INMARSAT-C antennas are larger but omni-directional.
4. D INMARSAT-C antennas are smaller but omni-directional, while INMARSAT-B antennas are parabolic for lower gain.

Tip: press A-D to answer