To beat blockage through the mast, some yachts have two antennas, one particular on all sides of the mast, to port and starboard. The blockage zones established in each antenna controller figure out when the arbitrator coax relays will change with the blocked antenna to your antenna with clear sight https://docs.google.com/document/d/e/2PACX-1vQGnpPIcFRIGAXSmhRySzDQ2yhWlbtds5pYxhE3lisWWO3SVYDkw5tjl9rC3Tudkta2SsIkpFSbm5Lg/pub