To overcome blockage through the mast, some yachts have two antennas, one on either side of your mast, to port and starboard. The blockage zones set in Each and every antenna controller determine if the arbitrator coax relays will swap within the blocked antenna on the antenna with obvious sight https://docs.google.com/document/d/e/2PACX-1vQGnpPIcFRIGAXSmhRySzDQ2yhWlbtds5pYxhE3lisWWO3SVYDkw5tjl9rC3Tudkta2SsIkpFSbm5Lg/pub