Ian Waugh - A Mariner\'s Guide to Marine Communications

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Figure 1X7

Regions 1, 2 and 3 - and Tropical zones

HF intership (simplex) voice frequencies

(carrier frequency shown in kHz)

Calling frequency (note 1) Working frequencies
4125 kHz (note 2) 4146; 4149
6215 kHz (note 2) 6224; 6227; 6230
8255 kHz (note 3) 8294; 8297
12290 kHz (note 2) 12353; 12356; 12359, 12362; 12365
16420 kHz (note 2) 16528; 16531; 16534; 16537; 16540;
16543; 16546
18795 kHz (note 3) 18825; 18828; 18831; 18834; 18837;
18840; 18843
22060 kHz (note 3) 22159; 22162; 22165; 22168; 22171;
22174; 22177
25097 kHz (note 3) 25100; 25103; 25106; 25109; 25112;
25115; 25118
Notes
1 There are no ship-to-ship DSC alerting frequencies, on HF, for routine
DSC calls. You need to arrange a 'time sked (schedule)' with other ships
in the fleet/friends, to listen for calls, on a particular voice calling
frequency. Calls should be kept brief and follow the normal rules, namely:
Listen-out before calling, to avoid interfering with other vessels;

• Use ship's names/callsigns no more than 3 times;

MARINE COMMUNICATIONS 239