Original sentence: , aircraft tail registration, or telephony designator and flight identification) in order to be sure that their aircraft is the intended recipient of a transmission.In order to avoid confusion of two or more aircraft that use the same SELCAL code, ASRI tries to assign code duplicates to aircraft that do not usually operate in the same region of the world or on the same HF radio frequencies.In order to initiate a SELCAL transmission, a ground station radio operator enters an aircraft's SELCAL code into a SELCAL encoder.The crew can then make use of the information they have received.The crew next turns up the volume on the aircraft radio in order to hear the incoming voice transmission.Therefore, air crew should always verify both SELCAL and call sign (i
Edited sentence: , aircraft tail registration, or telephony designator and flight identification) to be sure their aircraft is the intended recipient.The crew next turns up the volume on the aircraft radio to hear the incoming voice transmission.The crew then uses the received information.Therefore, air crew always verify both SELCAL and call sign (i.To avoid confusion from two or more aircraft using the same SELCAL code, ASRI tries to assign code duplicates to aircraft that do not usually operate in the same region of the world or on the same HF radio frequencies.To initiate a SELCAL transmission, a ground station radio operator enters an aircraft's SELCAL code into a SELCAL encoder