Underwater GPS G2
The most robust acoustic positioning system on the market today!Configure and buy
100 or 300 meter range. Select the version that suits your needs.
No need for separate receivers makes for a less resource demanding operation.
Access the Graphical User Interface through any standard web browser.
You can choose between using a compact antenna or separate cabled receivers as your receiving baseline.
The antenna is quick and easy to set up while the separate receivers will enable very flexibly designed baselines. Both supports the full 300 meter range.
The Locator transmits an acoustic signal which are picked up by the Receivers.
The antenna or separate Receivers picks up the acoustic signal from the Locator.
The topside positioning computer uses advanced algorithms to triangulate and calculate the position of the Locator based on the received signals from the antenna/receivers.
See the range difference between the R100 and R300.
Underwater GPS G2 comes in two different range versions; R100 and R300 where the number indicates the maximum range in meters between the Locator and Antenna/Receivers.
The operational area is designed as a cylinder with a radius of 100/300 meters and a depth of 100/300 meters.
The 100/300 meter range is a “hard limit”, meaning that once the Locator moves outside that range, the position will not be calculated.
The range is limited by the acoustic signal from the Locator and the software running on the Master-D1 positioning computer.
If you know you won’t need the full cylindric search area, it is beneficial to the performance of the system to apply some limits.
You can reduce the radius of where the system will search for the locator. This is a great idea if you are operating in a confined space like water tanks, pools, fish cages or similar.
Reducing the range even in the open ocean may give you a better performance on short distances.
You can limit which part of the cylinder you want to operate within. This should be done if there are obstacles like land or other no-go places for your ROV.
Reducing the area even in the open ocean may give you a better performance.
It is not possible or needed to limit the depth. All Underwater GPS systems relies on a separate pressure sensor to provide the depth of the locator.
With the new G2 you can now operate out to a range of 300 meters. This makes the G2 the perfect underwater positioning system for operating in most situations you are ever likely to encounter.
The new G2 system has a completely rewritten positioning algorithm. Several years have gone by since we launched the Explorer Kit and thousands of hours of new research has gone into the new positioning algorithm making it better than ever!
Based on customer feedback on the old Explorer Kit, we have added lots of new features to the G2 system. Built-in WiFi, Quick deploy antenna and an upgraded GPS are just some examples.
All underwater GPS system is supplied with a pre-loaded Graphical User Interface (GUI). The GUI runs on the G2 Topside and is accessed through a standard web browser.
Video: Shows the previous generation GUI.
Underwater GPS G2 is extremely easy to deploy and start to use!
1. Mount Locator
2. Deploy antenna
The four receivers can be delivered with cable lengths of 10, 50 or 100 meter. This opens up for very flexible deployment options, even on the largest boats.
1. Mount Locator
2. Drop Baseline
3. Input Baseline in GUI
When possible, try to spread the Receivers out so you have at least 2 meters between them. Placing the receivers at different depths may increase performance.
Make sure the receivers are well submerged and preferably below the splash zone where there might be air bubbles from waves etc.
If you are unable to deploy a square baseline, you might end up with some limitiations.
In the example to the left, all receivers are on one line. With such a setup it is not possible to decide which side (A or B) of the baseline your locator is. You have to limit the search area in the GUI to only one of the sides.
The benefits of the G2 are truly appreciated when working in the most challenging environments.
Combining the multiple receivers with extremely sophisticated software algorithms running on modern hardware, Underwater GPS G2 excels where traditional positioning systems stop working.
The amazing performance comes to display especially when the environment is challenging:
By utilising a Short BaseLine (SBL) principle the G2 is both stable and accurate, positioning the Locator to within 1 meter at 100 meter range
The video below shows a performance test of the G2 which is mounted to a boat that is fitted with an RTK enabled GPS.
The RTK GPS provides ~1cm accuracy positioning of the boat and allows us to generate a tracklog for the boat as it navigates around the marina. We then have a tracklog for the GPS and for the G2.
By overlaying the GPS tracklog with the G2 tracklog we demonstrate how reliable and accurate the G2 is, despite the difficulties associated with acoustic positioning in shallow water (~6-8m depth).