Radio stations looking to communicate in a resilient and reliable manner in a short to medium distance (0-300 miles) can shoot an HF radio signal straight up and have it bounce right back down to earth using the ionosphere, rather than an artificial satellite repeater. That technique is known as Near-Vertical Incidence Skywave (NVIS).

Since 2015, the Ohio Section of the ARRL has hosted an annual operating event known as NVIS Day. We encourage operators interested in BLACK SWAN 22 to participate in NVIS Day, and add a few objectives to their operation:

  1. Check the BLACK SWAN Net Activation to see what we have in store,

  2. Note the BLACK SWAN Net transmissions of images and receive them with FLDIGI (no 5 MHz transmission capability required to receive!), and

  3. Send us an NVIS Day 22 report with an FLMSG custom form completed in FLMSG and saved, with the k2s file sent by FLAMP to KD8TTE on the net (or via RF Winlink if you cannot transmit on 5 MHz). Follow the link to extract the HTML file from the ZIP, and save the HTML to your FLMSG CUSTOM folder.

You might like the video below on NVIS for emergency and post-disaster communication, and review of some past NVIS Day activity.