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.