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Astro 320 and DC40 Owner’s Manual 67
Appendix
only takes a few seconds when
the accessories are activated and
functioning correctly.
• When paired, your Garmin device
receives data from only your
accessory, and you can go near
other accessories.
You can purchase additional maps,
such as BirdsEye
™
satellite imagery,
Garmin custom maps, Inland lakes,
Topo, BlueChart
®
g2 and City
Navigator maps. Go to www.garmin
.com/us/maps/.
You must provide your own Phillips
screwdriver to replace the DC 40
collar.
1. Carefully cut the zip tie that secures
the VHF antenna to the collar.
2. Remove the two screws on the back
plate of the DC 40.
3. Lift off the mounting plate.
4. Remove the old collar.
5. Align the new collar with the
DC 40.
The buckle should be on the side
opposite of the power button.
6. Replace the mounting plate and
screws.
7. Replace the zip tie that secures the
VHF antenna to the collar.
Trim the zip tie and any sharp
edges.