C.4.  Calls on Aeronautical Frequencies
 When initiating calls on aeronautical frequencies, there are differences in phraseology and procedures from those of Coast Guard communications.  Aircraft call signs remain the same, for example in this case “N123AB”.  Aircraft procedure normally includes the make or model of the aircraft as a prefix to the call.  This allows the air traffic controller to better identify the aircraft when pointing it out as traffic to other aircraft.  It also gives the controller an idea as to its operational capabilities.
 
C.4.a.  Flying While Not Under Orders
 When flying as a civilian aircraft, not under orders, the aircraft would identify itself on initial transmissions as: <Aircraft Type/Model> <Aircraft ID>.
EXAMPLE:
“Miami Tower, Cessna One Two Three Alpha Bravo.”
 
C.4.b.  Flying While Under Orders
 When flying under orders, an Auxiliary aircraft is considered to be a Coast Guard aircraft.  The call sign would be “Coast Guard AUXAIR <ID>” where the <ID> is the alphanumeric registration following the initial “N”.
EXAMPLE:
“Miami Tower, this is Coast Guard AUXAIR One Two Three Alpha Bravo.”
 
C.4.b.1.  Auxiliary Aircraft Type or Model Reporting
 On many occasions it is useful to indicate to ATC the type or model of Auxiliary aircraft that is flying under orders. 
EXAMPLE:
“Miami Approach, this is Coast Guard AUXAIR Skyhawk One Two Three Alpha Bravo.”
 
C.4.b.2.  RESCUE Prefix Usage
 When engaged in actual SAR operations, the prefix RESCUE may be appended to AUXAIR.
EXAMPLE:
“Republic Tower, this is Coast Guard AUXAIR Rescue One Two Three Alpha Bravo.”
 
C.5.  Aeronautical Station Designations
 The following are aeronautical station designations:
. ARTCC: “Memphis Center”

. Approach control: “Boston Approach”

. Airport tower: “Baton Rouge Tower”

. Airport ground control: “Jacksonville Ground”

. Pre-taxi clearance control: “Kennedy Clearance”

. FSSs: “Portland Radio”

. Enroute flight advisory service: “Oakland Flight Watch”

 
C.6.  Additional Reporting Procedures
 The following are additional communication reporting procedures.
 
C.6.a.  Time
 Time is given in the 24-hour clock and each digit is said separately.  Times given by aircraft in informal radio traffic are expressed in minutes after the hour with the hour itself not given unless necessary.
EXAMPLE:
0825 – “zero eight two five” or “minute two five”
　
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