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Comparison of navigation and tracking systems |
Comparison table of navigation systems
| RedWave underwater GPS | RWLT | RWLT + RedPhone-DX |
Zima2 USBL | uWave USBL | WAYU | |
|---|---|---|---|---|---|---|
| System type | LBL | LBL | LBL | USBL | USBL | LBL |
| Location where navigation information is generated | Underwater object |
Surface control point |
Surface control point |
Surface control point |
Surface control point |
Surface control point |
| Number of positioned objects | ∞ | 1 | up to 2551 | up to 161 | up to 201 | 1 |
| Nominal navigation data update period | 1 s | 2 s | Position update at the end of each voice message from a diver | ≥ 12 s | ≥ 3.62 s | 2 s |
| Maximum working area size | 700 x 700 m | 1500 x 1500 m | 1500 x 1500 m | circle R = 3000 m | circle R = 1000 m | 300 x 300 m |
| Nominal accuracy | 2DRMS 0.84 m | 2DRMS 0.84 m | 2DRMS 1.5 m | 1° (≈17 m at a distance of 1000 m) | 2° (≈35 m at a distance of 1000 m) | 2DRMS 1.48 m |
| Maximum depth | 3003 m | 300/5003,4 m | 100 m | 300/350/10004 m | 300 m | 100 m |
| Navigation data generated | Latitude, Longitude, Depth, Temperature, UTC time7, Course |
Latitude, Longitude, Depth5, Temperature5, Course |
Latitude, Longitude |
Range, Azimuth, Depth, Battery charge, Latitude6, Longitude6 |
Range, Azimuth, Depth, Battery charge, Latitude6, Longitude6 |
Latitude, Longitude, Course |
| Maximum relative velocity | ±1.8 m/s | ±1.8 m/s | ±1.8 m/s | ±2 m/s | ±1 m/s | ±2 m/s |
| Deployment features | Requires 4 floating buoys to be deployed | Requires 4 floating buoys to be deployed | Requires 4 floating buoys to be deployed | Requires mounting the base station on a rigid pole and connecting an external GPS and compass | Requires mounting the base station on a rigid pole and connecting an external GPS and compass | Requires 4 floating buoys to be deployed |
| Distinctive feature | - Unlimited number of simultaneously positioned devices. - No calibration required. - Ability to connect to the Aquatab S diver’s tablet |
- The fastest and easiest system deployment. - Diver positioning simultaneously with voice transmission. - No calibration required. |
- The fastest and easiest system deployment. - Diver positioning simultaneously with voice transmission. - No calibration required. |
- Automatic operation. - Ability to transmit user telemetry data from the beacon8 |
Two-way data transmission | - The most affordable solution for recreational use. - No calibration required. |
1 The maximum supported number of responder-beacons is specified; the system works with them sequentially.
2 The minimum value is indicated when working with one responder-beacon located at a distance of up to 100 meters from the base station.
3 For the diver version, the maximum depth is 70 m.
4 Different maximum depths for different system versions.
5 The parameters are available only when working with the RWLT pinger. When positioning diver telephone devices, these parameters are not available.
6 These parameters are available only when external sources of navigation data are connected: the heading and geographic position of the base station.
7 These parameters are not available in the diver version of the receiver.
8 When the responder-beacon is data-interfaced with the carrier, up to 28 different user integer parameters in the range from 0 to 499 can be set. Each of these parameters can be transmitted by the beacon on request from the direction-finding station.