Furuno FELCOM 16 Operator's Manual page 52

2. SYSTEM INITIALIZATION
13. Yes is selected; press the [Enter] key to register input.
Note: If the ID or frequency entered is invalid the message "Input Error: NCS
14. Press the [Esc] key twice to return to the standby display.
2-18
ID" (for invalid ID) or "Input Error: Channel No." (for invalid frequency)
appears. Clear the error message by pressing the [Esc] key. Place the
cursor at the invalid ID or frequency code. Then, press the [Enter] key
and enter correct ID or frequency.