Figure out the weight of the device (ROV, submarine,etc), and then the weight of the water displaced. When they are equal, the device is neutrally buoyant. However, usually engineers create a ROV with a slightly positive or negative bouyancy, personally I perfer a positivly buoyant ROV because if you lose power or the tether is cut the ROV will ascend back up to the top. A more simple answer is that when the gravity & buoyancy are equal it is neutrally buoyant
A breathing barrier device should be used if providing rescue breathing to minimize the risk of disease transmission.
prevent victim from vomiting
Buoyant - is something that 'floats' on the surface of whatever medium it is resting on. For example a boat on water is buoyant.
Six characteristics of buoyant economy
Sodium chloride isn't buoyant.
Buoyant and light-hearted
The buoyant beach ball floated in the sea...
Uranium is not buoyant; uranium is a very dense metal.
continental is more buoyant
A boom is a floating spill containment system. It can be made of ubber, wood or any other buoyant material and fabric.
Buoyant force is based upon the mass of the water displaced. Therefore, two objects will have the same buoyant force if they have the some volumes.