2.
Natural interference (static)
3.
A conversation between two stations
4.
Confirmation of contact (card)
14.
Do you confirm receipt?
15.
What is my bearing from you?
16.
What is the correct time?
18.
Have you anything for me?
19.
Does my frequency vary?
20.
How is the tone of my transmission?
21.
Can you hear me between your signals?
22.
Is this frequency in use?
23.
Is my transmission being interfered with?
24.
What is the readability of my signals?
25.
Are you troubled by static?
