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- i73+ vs AsteRx-U3 Marine
CHCNAV i73+ vs Septentrio AsteRx-U3 Marine
What i73+ does better (3) and where AsteRx-U3 Marine wins (2) — every spec side by side.
vs
2.9Positioning7.1
4.9Maps & navigation8.8
6.5Durability2.4
Dimensions
Size comparison
i73+AsteRx-U3 Marine
| i73+ | AsteRx-U3 Marine | Difference | |
|---|---|---|---|
| Height | 85 mm | 45 mm | +40 mm |
| Width | 119 mm | 245 mm | −126 mm |
| Depth | 119 mm | 157 mm | −38 mm |
| Weight | 730 g | 1,500 g | −770 g |
Drawn to the same scale from the official dimensions (front and side).
Why is i73+ better than AsteRx-U3 Marine?
- Weight730 g vs 1,500 g2.1×
- Operating temperature (min)-40 °C vs -30 °C+-25%
- Tracking channels624 vs 544+15%
Why is AsteRx-U3 Marine better than i73+?
- Internal storage8 GB vs 16 GB2×
- Satellite systems supported5 vs 6+20%
Specifications
Side by side
| Satellite positioning | ||
| Satellite systems | GPS, GLONASS, Galileo, BeiDou, QZSS | GPS, GLONASS, Galileo, BeiDou, QZSS, NavIC (IRNSS) |
| Satellite systems supported | 5 | 6 |
| Tracking channels | 624 | 544 |
| SBAS (WAAS / EGNOS) | — | Yes |
| RTK positioning | Yes | — |
| Tilt compensation (IMU) | Yes | — |
| Dual-antenna heading | — | Yes |
| Correction sources | NTRIP (internet), UHF radio | NTRIP (internet), UHF radio, Cellular modem, L-band / PPP, SBAS |
| Built-in UHF radio | Yes | Yes |
| L-band / PPP corrections | — | Yes |
| Raw data logging (RINEX) | Yes | — |
| Maps & navigation | ||
| Internal storage | 8 GB | 16 GB |
| Connectivity & safety | ||
| Wi-Fi | — | Yes |
| Bluetooth | Yes | Yes |
| Cellular modem (4G / LTE) | — | Yes |
| Battery & power | ||
| Battery life | 18 h | — |
| Battery capacity | 6,800 mAh | — |
| Power source | Removable rechargeable pack | — |
| Build & durability | ||
| Protection rating | IP67 | — |
| Water protection (IPx) | IPx7 | — |
| MIL-STD-810 | — | Yes |
| Drop resistance | 2 m | — |
| Operating temperature (min) | -40 °C | -30 °C |
| Operating temperature (max) | 65 °C | 65 °C |
| Weight | 730 g | 1,500 g |
| Width | 119 mm | 245 mm |
| Height | 85 mm | 45 mm |
| Depth | 119 mm | 157 mm |
| Housing material | — | Ruggedized enclosure IP68 |
