A curtain antenna is similar to a bank of stadium lights. Rather than housing one large light bulb, each bank of stadium lights has several vertical and horizontal rows of small light bulbs. Behind each light bulb is a reflector, which directs and focuses the light. So it is with our curtain antennas. Steel, Sun, and Salt Air Radio in the tropics is an exercise in maintenance.
Typhoons try to blow the antennas down, and sometimes succeed.
Daily winds relentlessly flex them. Salt air tries to dissolve them. You can slow down this process, but you can't stop it. Specifically, the reflector screens on Antennas 2 and 3 have been yanked, flexed, corroded, spliced, and patched to the point where it is no longer feasible to maintain them. As mentioned, the reflector screens are composed of a heavy wire mesh.