Which of the following is a way to determine current propagation on a desired band from your station?
Use a network of automated receiving stations on the internet to see where your transmissions are being received✓Bonne réponse
Check the A-index
Send a series of dots and listen for echoes
All these choices are correct
Explication
Networks such as the Reverse Beacon Network, WSPR and PSK Reporter consist of automated receivers that publish what they actually decoded, so they report the real state of a specific band and path in near real time. The A-index is a global geomagnetic summary rather than a measurement of a given path, so it is only a general indicator.