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Automotive GPS
| Outdoor GPS
| Marine GPS
| OEM GPS
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     Garmin Nuvi 3597LMTHD Model: 010-01118-00
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     Garmin Oregon 450 Model: 010-00697-40
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     Garmin GPSMAP 421s Sounder with Dual Frequency Transducer Model: 010-00764-01
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     Garmin GPS 18x High-Sensitivity LVC Model: 010-00321-36
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Ships with: nüvi 3597LMTHD, Preloaded City Navigator® NT for North America, Lifetime maps¹ and HD digital traffic² (indicated by “LMTHD” after model number on the box), Lifetime traffic receiver/vehicle power cable, Vehicle suction cup mount
USB cable, Quick start manual
| Ships with: Oregon 450, Carabiner clip, USB cable, Quick start manual
| Ships with: GPSMAP 421s Sounder, Dual Freq Transducer Depth Temp Plastic Kit, Fishfinder Sounder Power Data cable, GPSMAP 420 and 430 Cover, GPSMAP 420 and 430 Marine Swivel Mounting Bracket
| Ships with: GPS 18 LVC
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$349.95
| $199.95
| $379.95
| $54.95
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| General | | | | |
| 1 | Unit dimensions, WxHxD: | 5.4W x 3.1H x 0.5D inches (13.8 x 7.7 x 1.3 cm) | 2.3 x 4.5 x 1.4 in (5.8 x 11.4 x 3.5 cm) | 5.7in x 5.0in x 2.7in (14.5 x 12.7 x 6.9 cm) | 2.4 inch diameter |
| 2 | Display size, WxH: | 4.3W x 2.9H inches (10.9 x 6.5 cm); 5 inch diag (12.7 cm) | 1.53W x 2.55H inches (3.8 x 6.3 cm) 3 inch Diag (7.6 cm) | 2.4in x 3.2in, 4.0in diagonal (6.1 x 8.1 cm, 10.2 cm diagonal) | |
| 3 | Display resolution, WxH: | 800 x 480 pixels | 240 x 400 pixels | 240 x 320 pixels | |
| 4 | Display type: | multi-touch, glass, dual-orientation, WVGA color TFT with white backlight | Transreflective color TFT touchscreen | QVGA display | |
| 5 | Weight: | 6.8 oz (192 g) | 6.8 oz (192.7 g) with batteries | 1.3 lb (590 g) | < 5 oz |
| 6 | Battery: | rechargeable lithium-ion | 2 AA batteries (not included); NiMH or Lithium recommended | none | |
| 7 | Battery life: | up to 2 hours | 16 hours | none | |
| 8 | Waterproof: | |  (IPX7) |  (IPX7) |  (IPX7) |
| 9 | GPS-enabled: | 
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| 10 | High-sensitivity receiver: | 
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| 11 | PC interface: | USB | USB | None | |
| 12 | RoHS version available: | 
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| 13 | Preloaded maps: | 
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| 14 | Map coverage area: | USA + Canada | Regional | | |
| 15 | Ability to add maps: | 
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| 16 | Street Map Compatible: | 
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| 17 | Topographic Map Compatible: |  (limited) | 
|  (limited) | |
| 18 | Marine Software Compatible: | | 
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| 19 | Bluechart g2 Map Compatible: |  (limited) | 
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| 20 | Bluechart g2 Vision Map Compatible: | | | 
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| 21 | Built-in memory: | 
| 850 MB | | |
| 22 | Accepts data cards: | microSD data card | microSD data card | SD data card | |
| 23 | Waypoints/favorites/locations: | 1000 | 2000 | 3000 | |
| 24 | Additional: | - Speaker: Internal and Mount Speaker
- 3-D terrain view:

- 3-D buildings:

- Trip Planner:

- Trip Log:

- Receive live services via your compatible Android smartphone with Smartphone Link. Software update may be required.
- This USB mass storage device is compatible with Windows® XP or newer and Mac® OS X 10.4 or later.
| | N/A | |
| 25 | Garmin Connect™ compatible (online community where you analyze, categorize and share data): | | 
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| 26 | Widescreen | 
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| 27 | Custom Maps Compatible | | 
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| Automotive | | | | |
| 28 | Routes: | 100 | 200 | 100 | |
| 29 | Basemap: | 
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| 30 | Voice prompts (e.g. "Turn right in 500 ft."): | 
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| 31 | Speaker Location: | Internal | Internal Buzzer | | |
| 32 | Speaks street names (e.g. "Turn right ON ELM STREET in 500 ft.") : | 
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| 33 | Speech recognition (navigate with voice commands): | 
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| 34 | 3D map view: | 
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| 35 | Automatic routing (turn by turn routing on roads): | 
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| 36 | Auto sort multiple destinations (provides most direct route): | 
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| 37 | Auto re-route (fast off-route and detour recalculation): | 
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| 38 | Choice of route setup (faster time, shorter distance, off road): | 
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| 39 | Route avoidance (avoid highways, tolls etc.): | 
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| 40 | Custom POIs (ability to add additional points of interest): | 
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| 41 | Hands-free calling with Bluetooth® wireless technology: | 
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| 42 | FM traffic compatible: | 
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| 43 | Where Am I? feature (find closest hospitals, police & gas stations, nearest address & intersection): | 
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| 44 | Car locator feature (marks position when removed from windshield mount): | 
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| 45 | Picture viewer: | | 
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| 46 | Configurable vehicle icons (select car-shaped icons for map navigation): | 
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| 47 | Touchscreen: | 
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| 48 | Qwerty or ABC keyboard (choose keyboard layout): | 
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| 49 | Antenna Type: | Internal | Internal | Internal | |
| 50 | External Antenna Jack: | None | None | BNC | |
| 51 | Automotive-friendly: | 
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| 52 | Motorcycle-friendly: | | 
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| 53 | Lane Assist |  (with Junction View) | | | |
| 54 | Speed Limit Indicator | 
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| 55 | Lifetime Traffic | 
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| 56 | Lifetime Maps Included | 
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| 57 | trafficTrends (calculates routes from predicted traffic flow) | 
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| 58 | myTrends (predicts routes from user's navigation behavior) | 
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| 59 | Garmin Garage vehicles compatible (download car icons) | 
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| 60 | Garmin Garage voices compatible (download custom voices) | 
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| Outdoor | | | | |
| 61 | Track log: | | 10000 points, 200 saved tracks | 10,000 points; 50 saved tracks | |
| 62 | Electronic compass: | |  (3-axis) | | |
| 63 | Barometric altimeter: | | 
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| 64 | Hunt/fish calendar: | | 
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| 65 | Sun and moon information: | | 
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| 66 | Tide tables: | | 
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| 67 | Area calculation: | | 
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| 68 | Geocaching mode: | | 
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| 69 | Outdoor GPS games: | | 
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| 70 | Unit-to-unit transfer (shares data wirelessly with similar units): | | 
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| Fitness | | | | |
| 71 | Heart rate monitor compatible: | |  (optional accessory) | | |
| 72 | Bike speed/cadence sensor compatible: | |  (optional accessory) | | |
| 73 | Garmin Training Center® software compatible: | | 
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| 74 | Customizable screen(s) | | 
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| Marine | | | | |
| 75 | Portable | | 
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| 76 | Marine Auto Guidance | | | 
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| 77 | Sonar compatible | | | 
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| 78 | Supports AIS (tracks target ships' position) | | | 
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| 79 | Supports DSC (displays position data from DSC capable VHF radio) | | | 
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| 80 | Audible alarms | | 
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| 81 | XM WX Weather & Radio for U.S. compatible | | | 
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| 82 | NMEA input/output | |  (NMEA 0183) |  (NMEA 2000/0183) | |
| 83 | Dual-beam sonar capable | | | 
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| 84 | Dual-frequency sonar capable | | | 
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