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FINAL REPORT - Stakeholders - Ofcom

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ANNEX 5 Structure of the 4, 6 and 8 MHz HF Maritime Bands<br />

Sub-band structure of the 4 MHz maritime band<br />

4.05 4.1 4.2 4.3 4.4 4.45<br />

4 063.3 063.3 – – 4 064.8 4 064.8 oceanographic oceanographic research research communications communications - 6 × 0.3kHz chs - 6 × 0.3kHz chs<br />

4 066.4 – 4 114.4 ship-to-shore radiotelephony - 27 × 3kHz chs<br />

4 066.4 – 4 114.4 ship-to-shore radiotelephony - 27 × 3kHz chs<br />

4 147.4 – 4 150.4 simplex radiotelephony - 2 × 3kHz chs<br />

4 147.4 – 4 150.4 simplex radiotelephony - 2 × 3kHz chs<br />

4 154.0 – 4 170.0 ship-to-shore wideband telegraphy, facsimile - 5 × 4kHz chs<br />

4 154.0 – 4 170.0 ship-to-shore wideband telegraphy, facsimile - 5 × 4kHz<br />

chs 4 172.5 – 4 181.5 ship-to-shore NBDP (Telex) - 18 × 0.5kHz chs<br />

4 181.75 – 4 186.75 ship-to-shore Morse telegraphy calling chs<br />

4 172.5 – 4 181.5 ship-to-shore NBDP (Telex) - 18 × 0.5kHz chs<br />

4 187.0 – 4 202.0 ship-to-shore Morse telegraphy working channels - 31 × 0.5kHz chs<br />

4 181.75 – 4 186.75 ship-to-shore Morse telegraphy calling chs<br />

4 202.5 – 4 207.5 simplex NBDP (Telex) - 10 × 0.5kHz chs<br />

4 187.0 – 4 202.0 ship-to-shore Morse telegraphy working channels - 31 ×<br />

0.5kHz 4 207.5 – chs 4 209.0 ship-to-shore DSC - 4 × 0.5kHz chs<br />

4 209.5 – 4 219.0 shore-to-ship NBDP (Telex) - 20 × 0.5kHz chs<br />

4 202.5 – 4 207.5 simplex NBDP (Telex) - 10 × 0.5kHz chs<br />

4 219.5 – 4 220.5 shore-to-ship DSC – 3 × 0.5kHz chs<br />

4 207.5 – 4 209.0 ship-to-shore DSC - 4 × 0.5kHz chs<br />

4 221.0 – 4 351.0 shore-to-ship wideband telegraphy, facsimile, NBDP, special etc<br />

4 209.5 – 4 219.0 shore-to-ship NBDP (Telex) - 20 × 0.5kHz chs<br />

4 352.4 – 4 436.4 shore-to-ship radiotelephony - 29 × 3kHz chs<br />

Page 331<br />

Colour key<br />

Radiotelephony<br />

Wideband and Morse telegraphy, fax,<br />

etc<br />

Oceanographic research<br />

Morse telegraphy<br />

NBDP – narrow-band direct-printing (tlx)<br />

DSC - digital selective calling<br />

Ship station channels<br />

Coast station channels<br />

Simplex channels

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