In case of recovry object is diving equipment such as diving computers, take them in your hand and recovery them.

As you need a lift bag and support from the water surface for recovering heavy object, you should attach a marker buoy to the object and check its position from the water surface so that you do not lose position of the found target.

If the marker buoy is attached, you can find the target again even if you failed to recovery the target.

The marker buoy rises to the water surface when you release your hand