Raymarine Ray230 Owner's Handbook Manual page 82

Operations
Note: Pressing and holding the CLR key for 3 seconds during either
ENTRY or DELETE returns operation to the mode before the Menu
operation began.
Adding Ship Stations to the List
To add to the phonebook list for ship stations, input the MMSI number
and nickname of the station.
1. To enter the MMSI number, press the corresponding numeric keys (0
through 9). The currently selected location is indicated by a flashing
"–" character. Pressing a numeric key enters that value then advances
to the next digit's place. To go back by 1 digit, press the CLR key.
2. To enter the nickname, use the numeric keys (0 through 9) to input the
associated alpha or numeric value (refer to section 3.2 Controls and
LCD Display). The currently selected location is indicated by the
flashing "–" character. After inputting the desired letter or numeral,
press the ENT key to submit the entry and proceed to the next place.
To go back by 1 digit, press the CLR key.
If no nickname is to be registered, press the ENT key for all characters
so that they all display a "–".
3. When the message CONT? Y appears, press the ENT key to submit.
Note: The 0 key will enter only the numeral "0", while the 1 key will
alternately enter "1" and "space". The 0 and 1 keys do not have associated
alpha characters.
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