The tallest structure of Africa is still located close to Monrovia. One of the three remaining antennas of the defunct Omega Navigation system is located in Paynesville, in the greater Monrovia area. Omega was a US – Navigation system operating in the Very Low Frequency (VLF) band, between 10 and 14 kHz. It was used both for navigation as well as for submarine communication. Omega was operated from 1970 until 1997 when GPS proved more accurate.
Due to the extreme wavelength, Omega needed very long antennas. The transmitter in Paynesville used a umbrella antenna suspended on a 417m high mast.

OMEGA HAIKU TRANSMITTER B - 1990

Four transmitter building tours with great photos! The Transmitter Room Tour is essential for appreciation of the Omega system.
Ω Transmitter Room (IMPORTANT new photos)
Ω Emergency Generators (At five Omega stations)
Ω Office space tour photographed in 2009 Ω Dummy Load Room & Second Deck

Photo by Steve Malavolti - 1986 - Courtesy of Dr. Hillstrom