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- GPSMAP 66i vs GPSMAP 79s
Garmin GPSMAP 66i vs Garmin GPSMAP 79s
What GPSMAP 66i does better (2) and where GPSMAP 79s wins (1) — every spec side by side.
vs
4.7Positioning8.9
5.4Display6.9
6.8Battery4.7
6.9Durability5.9
Dimensions
Size comparison
GPSMAP 66iGPSMAP 79s
| GPSMAP 66i | GPSMAP 79s | Difference | |
|---|---|---|---|
| Height | 163 mm | 70 mm | +93 mm |
| Width | 62 mm | 170 mm | −108 mm |
| Depth | 35 mm | 40 mm | −5 mm |
Drawn to the same scale from the official dimensions (front and side).
Why is GPSMAP 66i better than GPSMAP 79s?
- Battery life35 h vs 19 h+84%
- Internal storage16 GB vs 8 GB2×
Why is GPSMAP 79s better than GPSMAP 66i?
- Satellite systems supported2 vs 52.5×
Specifications
Side by side
| Satellite positioning | ||
| Satellite systems | GPS, Galileo | GPS, GLONASS, Galileo, BeiDou, QZSS |
| Satellite systems supported | 2 | 5 |
| Multi-band GNSS (L1 + L5/L2) | No | — |
| Raw data logging (RINEX) | Yes | — |
| Display | ||
| Screen size | 3″ | 3″ |
| Resolution | 240 × 400 | 240 × 400 |
| Horizontal resolution | 240 px | 240 px |
| Vertical resolution | 400 px | 400 px |
| Pixel density | 155 ppi | 155 ppi |
| Display type | Transflective colour (sunlight-readable) | — |
| Touchscreen | — | Yes |
| Maps & navigation | ||
| Preloaded maps | Yes | — |
| Map types | Road, Topographic, Satellite imagery | — |
| Turn-by-turn routing | Yes | Yes |
| Satellite imagery | Yes | — |
| Internal storage | 16 GB | 8 GB |
| Memory card slot | Yes | — |
| Barometric altimeter | Yes | — |
| Waypoints | 10,000 | — |
| Connectivity & safety | ||
| Two-way satellite messaging | Yes | — |
| SOS / emergency alert | Yes | — |
| Satellite network | Iridium | — |
| Wi-Fi | Yes | — |
| Bluetooth | Yes | — |
| ANT+ | Yes | — |
| Smartphone notifications | Yes | — |
| Flashlight | Yes | — |
| Battery & power | ||
| Battery life | 35 h | 19 h |
| Power source | Built-in rechargeable | Rechargeable pack or AA |
| Runs on AA batteries | — | Yes |
| Build & durability | ||
| Protection rating | IPX7 | IPX7 |
| Water protection (IPx) | IPx7 | IPx7 |
| MIL-STD-810 | Yes | — |
| Weight | 230 g | — |
| Width | 62 mm | 170 mm |
| Height | 163 mm | 70 mm |
| Depth | 35 mm | 40 mm |
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