Sec. 80.1127  On-scene communications.

    (a) On-scene communications are those between mobile unit in 
distress and assisting mobile units, and between the mobile units and 
unit coordinating search and rescue operations.
    (b) Control of on-scene communications is the responsibility of the 
unit coordinating search and rescue operations. Simplex communications 
must be used so that all on-scene mobile stations may share relevant 
information concerning the distress incident. If direct-printing 
telegraphy is used, it must be in the forward error-correcting mode in 
accordance with CCIR Recommendation 625 as specified in Sec. 80.1101.
    (c) The preferred frequencies in radiotelephony for on-scene 
communications are 156.8 MHz and 2182 kHz. The frequency 2174.5 kHz may 
also be used for ship-to-ship on-scene communications using narrow-band 
direct-printing telegraphy in the forward error correcting mode in 
accordance with CCIR Recommendation 625 as specified in Sec. 80.1101.
    (d) In addition to 156.8 MHz and 2182 kHz, the frequencies 3023 kHz, 
4125 kHz, 5680 kHz, 123.1 MHz and 156.3 MHz may be used for ship-to-
aircraft on-scene communications.
    (e) The selection or designation of on-scene frequencies is the 
responsibility of the unit coordinating search and rescue operations. 
Normally, once an on-scene frequency is established, a continuous aural 
or teleprinter watch is maintained by all participating on-scene mobile 
units on the selected frequency.