When may an amateur station transmit without identifying on the air?
When the transmissions are of a brief nature to make station adjustments
When the transmissions are unmodulated
When the transmitted power level is below 0.1 watt
When transmitting signals to control model craft✓پاسخ درست
توضیح
Control signals sent only to a model craft are exempt from the identification procedure, on the condition that a label with the call sign and the licensee's name and address is fixed to the transmitter. Brief adjustment transmissions and low power do not remove the duty to identify.