Raymarine Ray54 - Appendix B: Channel List; U.S. Marine VHF Channels and Frequencies

Chapter 6: Menu Settings 75
6. Continue this process until all GROUP NAME characters have been
entered. Press and hold the CH knob to accept the name and move on to
the GROUP ID.
7. Use the same procedure to enter the GROUP ID numbers.
8. Press and hold the CH knob to accept.
9. Press the CH knob one more time to save. The new entry appears in the
list.