The only use , other than the WWV and CHU freqs, came when 60M was opened to Amateur Radio CW operation . So I finally programmed the 5 CW and 5 SSB operating frequencies for 60M into my two radios that have memories. My older SSB/CW rig with memories had a bunch of commonly used Marine and AERO ssb channels I programmed to listen to . The only other Ham radio I had, with memories, was an old RadioShack 2M FM mobile that had 40 "channels" you could program with simplex freqs or repeater pairs. .