■ Marine VHF Radio Channels

1. DISTRESS SAFETY AND CALLING : 16
   Use this channel to get the attention of another station(calling) or in emergencies (distress and safety)
2. DIGITAL SELECTIVE CALLING : 70
   Use this channel for distress and safety calling and for general purpose calling using only digital selective calling techniques
3. INTERSHIP SAFETY : 6
   Use this channel for ship-to-ship safety messages and for search and rescue messages and ships and aircraft of the Coast Guard.
4. INTERSHIP CHANNELS : 6, 8, 9, 10, 13, 15, 17, 67, 69, 72, 73, 77 (all simplex)
   Working channels for working ships only. Messages must be about business or the needs of the ship.
5. NAVIGATION SAFETY : 13
   (Also known as the bridge-to-bridge channel.) This channel is available to all ships. Messages must be about ship navigation, for example, passing or meeting other ships. You must keep your message short   
6. PORT OPERATION : 10, 12
   These channels are used in directing the movement of ships in or near ports, locks or waterways. Messages must be about the operational handling movement and safety of ships.
7. PUBLIC CORRESPONDENCE (MARINE OPERATOR) : 23~28(S.Korea), 60~66,  78, 81~86, 01~05, 07
   Use these channels to call the marine operator at a public coast station. By contacting a public coast station, you can make and receive calls from telephone on shore. Except distress calls, public coast station usually charge for this service