G2B06 : How can you avoid harmful interference on an apparently clear frequency before calling CQ on CW or phone?
A
Send QRL? on CW, followed by your call sign; or, if using phone, ask if the frequency is in use, followed by your call sign
B
Listen for 2 minutes before calling CQ
C
Send the letter V in Morse code several times and listen for a response, or say test several times and listen for a response
D
Send QSY on CW or if using phone, announce the frequency is in use, then give your call sign and listen for a response
Correct Answer: Send QRL? on CW, followed by your call sign; or, if using phone, ask if the frequency is in use, followed by your call sign