Do you have a question about the Garmin GPSMAP 421 and is the answer not in the manual?
Follow precise instructions for template dimensions and paper size to avoid incorrect cutouts on your boat's mounting surface.
Set Page Scaling to 'None' and enable 'Auto-Rotate and Center' for accurate template printing.
Verify printed template length and width match actual mount size before cutting to prevent errors.
Follow precise instructions for template dimensions and paper size to avoid incorrect cutouts on your boat's mounting surface.
Set Page Scaling to 'None' and enable 'Auto-Rotate and Center' for accurate template printing.
Verify printed template length and width match actual mount size before cutting to prevent errors.
| Sport (fitness, running) | No |
|---|---|
| Marine (chartplotters, sounders) | Yes |
| Routes quantity | 100 |
| Tracks quantity | 50 |
| Number of waypoints | 3000 |
| Map storage | Internal storage |
| Map view options | 3D |
| Form factor | Fixed |
| Display diagonal | 4 \ |
| Display resolution | 240 x 320 pixels |
| Display size (HxV) (imperial) | 2.4 x 3.2 \ |
| I/O ports | NMEA 0183, 2000 |
| Depth | 69 mm |
|---|---|
| Width | 145 mm |
| Height | 127 mm |
| Weight | 590 g |












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