comdtinst m2400.1f - US Coast Guard Response Boat-Medium

6.B.9. VHF. VHF will provide short range communications in the
shore-to-ship, ship-to-ship and ship-to-shore direction.
Distress alerts and safety calls (including general calling)
by DSC will be on channel 70 (156.525 MHz). Distress and
safety traffic by radiotelephony, including SAR coordinating
functions and on scene communications will be on channel
16 (156.8 MHz).
10. Maritime Safety Information. Broadcasts of Maritime Safety
Information will be made using NBDP techniques on NAVTEX
(518 kHz), INMARSAT SafetyNET (enhanced group calling), and an
internationally dedicated complement of HF NBDP channels.
Coast Guard Maritime safety information broadcasts on HF NBDP
(SITOR) will be made on these channels. See also, paragraph
G and N below.
11. Emergency Position-Indicating Radio Beacons (EPIRB's). The
GMDSS includes use of Category I 406 MHz satellite EPIRB's
operating through the COSPAS-SARSAT search and rescue
satellite system (see slso Chapter 2).