# Operating procedures and practices

### Explanation of question 7

When starting a CQ call you should

1. check the frequency is busy, to ensure good propagation
2. immediately call ‘QRZ?’
3. check the frequency is clear
4. send a long CQ call to establish your presence

The answer is :- 3 Before calling CQ the operator should listen to check the frequency is not being used. Any immediate ‘on air’ activity could interfere with another user.

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