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                                        Garmin GPSMAP 1643 Specs
			General | 
		|
| Dimension | 15.1” x 10.3” x 3.0” (38.4 x 26.2 x 7.6 cm) | 
|---|---|
| Weight | 9.7 lbs (4.4 kg) | 
| Waterproof | IPX7 | 
| Touchscreen | ✔ | 
| Display Type | FHD, IPS | 
| Display Size | 13.6″ x 7.7″; 15.6″ diagonal (34.5 cm x 19.5 cm; 39.7 cm diagonal) | 
| Display Resolution | 1920 x 1080 pixels | 
| Mounting Options | Bail, flush or flat (Garmin does not offer any hardware or accessories for a flat-mount installation. Professional tools and knowledge is required.) | 
| Input | Touchscreen | 
			Maps & Memory | 
		|
| Accepts Data Cards | 2 microSD cards (back of device) | 
| Waypoints | 5000 | 
| Track points | 50,000 | 
| Tracks | 50 saved tracks | 
| Navigation Routes | 100 | 
			Sensors | 
		|
| GPS | ✔ | 
| GLONASS | ✔ | 
| Galileo | ✔ | 
| Has built-in receiver | ✔ | 
| Receiver | 10 Hz | 
| NMEA 2000 Compatible | ✔ | 
| NMEA 0183 Compatible | ✔ | 
| Supports WAAS | ✔ | 
			Built-in Maps | 
		|
| Built-in Auto Guidance+ | ✔ | 
| Garmin Navionics+ Inland & Coastal | ✔ | 
| Tide tables | ✔ | 
			Optional Map Support | 
		|
| Garmin Navionics+™ | ✔ | 
| Garmin Navionics Vision+™ | ✔ | 
| TOPO 100K | ✔ | 
| Standard Mapping | ✔ | 
| Garmin Quickdraw Contours | ✔ | 
| Raster chart support | ✔ | 
			Chartplotter Features | 
		|
| Smart Mode Compatible | ✔ | 
| AIS | ✔ | 
| DSC | ✔ | 
| Supports Fusion-Link™ compatible radios | ✔ | 
| GSD Black Box Sonar Support | ✔ | 
| GCV Black Box Sonar Support | ✔ | 
| ActiveCaptain® compatible | yes | 
| GRID (Garmin Remote Input Device) compatible | ✔ | 
| Wireless Remote Compatible | ✔ | 
| Sailing Features | ✔ | 
| Spoken audio alerts | ✔ | 
| OneHelm support | ✔ | 
			Electrical Features | 
		|
| Power Input | 10 to 32 Vdc | 
| Typical current draw at 12 Vdc | 2.90 A | 
| Maximum current draw at 12 Vdc | 3.73 A | 
| Maximum power usage at 10 Vdc | 46.0W | 
			Sonar Features | 
		|
| Displays sonar | ✔ | 
| Traditional sonar (dual frequency/beam) | yes (with GCV black box, sold separately) | 
| ClearVü | yes (with GCV black box, sold separately) | 
| SideVü | yes (with GCV black box, sold separately) | 
| Panoptix™ sonar | ✔ | 
| LiveScope | ✔ | 
			Connections | 
		|
| NMEA 2000® ports | 1 | 
| Connections NMEA0183 Input Ports | 1 | 
| NMEA 0183 output (Tx) ports | 1 | 
| Video input ports | 1 (BNC composite) | 
| Video output ports | 1 HDMI | 
| J1939 ports | 1 | 
| Garmin Marine Network Ports | 2 | 
| 12-pin transducer ports | none (GCV black box required to add transducer) | 
| USB ports | ✔ | 
| BLUETOOTH® pairing | ✔ | 
| ANT+ (Connectivity) | ✔ | 
| Garmin Wi-Fi network (local connection) | ✔ | 
In the Box:
- GPSMAP 1643 chartplotter
 - microSD™ card preinstalled
 - Power cable
 - Flush mount kit with gasket
 - Protective cover
 - Trim piece snap covers
 - Backbone/drop cable (2 meters) and T-connector for the NMEA 2000® network
 - Documentation