| GPS II | GPS II+ | GPS III | GPS III+ | GPS III Pilot | GPS V | |
| Weight | 9.0 oz (255 g) | 9.0 oz (255 g) | 9.0 oz (255 g) | 9.0 oz (255 g) | 9.0 oz (255 g) | 9.0 oz (255 g) |
| Display Size | 2.6" | 2.6" | 2.6" | 2.6" | 2.6" | 2.6" |
| Display Resolution | 100 x 160 | 100 x 160 | 100 x 160 | 100 x 160 | 100 x 160 | 160 x 256 |
| Battery Type | AA x 4 | AA x 4 | AA x 4 | AA x 4 | AA x 4 | AA x 4 |
| Battery Life | 15 hrs | 20 hrs | 8 hrs | 18 hrs | 8 hrs | 25 hrs |
| Waterproof (IPX7) |
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| Floats |
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| GPS Receiver | MultiTrac8 | PhaseTrac12 | PhaseTrac12 | PhaseTrac12 | PhaseTrac12 | PhaseTrac12 |
| WAAS Enabled |
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| Quad Helix GPS Antenna |
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| Patch GPS Antenna |
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| External GPS Antenna |
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| GPS |
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| GLONASS |
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| WAAS |
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| Accuracy (GPS) | < 15 m | < 15 m | < 15 m | < 15 m | < 15 m | < 15 m |
| Accuracy (DGPS) | < 10 m | < 5 m | < 5 m | < 5 m | < 5 m | < 5 m |
| Accuracy (WAAS) |
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3 m |
| Altimeter | GPS | GPS | GPS | GPS | GPS | GPS |
| Barometer |
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| Compass | GPS | GPS | GPS | GPS | GPS | GPS |
| Tides |
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| Sunrise & Sunset |
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| Moon Phase |
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| Hunt & Fish Calendar |
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| Area Calculation |
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| Outdoor GPS Games |
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| Geocaching |
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| Point-to-Point Navigation |
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| On Road Navigation |
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| MOB |
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| TracBack |
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| Trip Info |
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| Track Log | 768 pts | 1,024 pts | 1,900 pts | 1,900 pts | 1,900 pts | 3,000 pts |
| Tracks (points per track) |
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10 (250) | 10 (250) | 10 (250) | 10 (250) |
| Routes (points per route) | 20 (30) | 20 (30) | 20 (30) | 20 (30) | 20 (30) | 20 (50) |
| Waypoints | 250 | 500 | 500 | 500 | 500 | 500 |
| Internal Memory | 1 MB | 1 MB | 1 MB | 1 MB | 1 MB | 19 MB |
| Expandable Memory |
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| Pre Loaded POIs |
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| Can Add POIs |
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| Pre Loaded Maps |
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| Can Add Maps |
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| GPS II | GPS II+ | GPS III | GPS III+ | GPS III Pilot | GPS V |
