The claims sound impressive but I am dubious as to how it can be made to work accurately with out some way to get an exact fix.
Accurate surface navigation, until relatively recently, was hard enough until there were satellites available for accurate position fixes. Prior to that, precise navigation required relatively precise equipment (sextant) and the knowledge to use it (as well as accurate time). Working out accurate positions without some means to get a physical fix (such as a landmark and means of accurately measuring the distance/ angles to it is very difficult.
Taking that underwater adds a whole new level of difficulty - there are virtually no accurate underwater maps, no way to get a fix and no way to know exact levels of drift. A human can manage close to a feature such as a wall dive (stick close enough and either go straight out and back on the wall or drift along it) or by diving a shape (triangular route or square). That only works with known features such as pinnacles etc. Even with that it can be easy to miss a waypoint or drift off course.
I struggle to see how a device can accurately track position without some way of either pinpoint location or a way to track speed, time, depth, drift. Tracking using G forces or accelerometers is ok but can they accurately log drift in multiple dimensions?
Accurate surface navigation, until relatively recently, was hard enough until there were satellites available for accurate position fixes. Prior to that, precise navigation required relatively precise equipment (sextant) and the knowledge to use it (as well as accurate time). Working out accurate positions without some means to get a physical fix (such as a landmark and means of accurately measuring the distance/ angles to it is very difficult.
Taking that underwater adds a whole new level of difficulty - there are virtually no accurate underwater maps, no way to get a fix and no way to know exact levels of drift. A human can manage close to a feature such as a wall dive (stick close enough and either go straight out and back on the wall or drift along it) or by diving a shape (triangular route or square). That only works with known features such as pinnacles etc. Even with that it can be easy to miss a waypoint or drift off course.
I struggle to see how a device can accurately track position without some way of either pinpoint location or a way to track speed, time, depth, drift. Tracking using G forces or accelerometers is ok but can they accurately log drift in multiple dimensions?
