Furuno COLOR VIDEO PLOTTER 1833C Operator's Manual page 207

Memory card messages
Various memory card messages appear to alert you to memory card-related
error. These are tabulated below.
Message
Memory card is not
inserted. Please insert
memory card. Push
ENTER knob to
continue.
Memory card is not
formatted. Push
ENTER knob to
continue.
Wrong card is inserted.
Please insert correct
memory card. Push
ENTER knob to
continue.
Overwrite data?
(Track)
(Mark)
(WPT)
(Config)
Memory card messages
Reason
Memory card not
inserted.
Unformatted memory
card.
Chart card inserted
instead of memory
card.
Data type to be
recorded exists on
memory card. (Two or
more of same type of
data cannot be
recorded.)
Remedy
Push the [ENTER] knob to return to the
SAVE DATA display and then insert card.
Push the [ENTER] knob to return to the
SAVE DATA display. Format the card
referring to page 6-1.
Remove chart card, insert memory card,
and then push the [ENTER] knob to
continue.
Push the [ENTER] knob to overwrite same
data type on the card, or press the
[CLEAR] key to escape.
6. DATA TRANSFER
6-3