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Northstar M121/M84 Installation and Operation Manual 7
CAUTION
Handle plug-in cards carefully. Keep them
in their protective cases when not plugged
into the M121/M84.
Keep the M121/M84 card cover closed at all
times to prevent moisture from entering the
card compartment.
1-3 Plug-in cards
The M121/M84 can use two kinds of C-MAP™
SD-Card plug-in cards:
1. Chart cards have chart details required for
navigating in a particular region. When
you insert a chart card, the extra details
automatically appear on the Chart window.
You can plug in up to two chart cards
at once. If the chart shows a region not
covered by a chart card, then it displays a
simplified built-in world chart.
2. User cards store navigation data. A user card
allows navigation data to be transferred
to another compatible instrument (see
section 15).
Removing a plug-in card
Turn the M121/M84 off
(see section 2-2).
Open the card cover on the
right of the display.
Inserting a plug-in card
Push the card down until it
releases and can pop up.
Lift the card out.
Put the card in its case.
Hold the new card with the
gold contacts on the far side.
Push the card into an empty
socket until it clicks.
Close the card cover.
Turn the M121/M84 on
(see section 2-2).
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