Why No One Talks About Gear Anymore

What is an Underwater Propulsion Vehicle

In order to increase the range underwater of scuba and rebreather divers, they use an item of diving equipment called underwater propulsion vehicle, also known as underwater scooter or diver propulsion vehicle or DPV.

The meaning of range can be explained in three situations, and these are the restricted quantity of breathing gas that can be carried, the rate of breathing gas consumed under exertion, and the time limits stated by the dive tables in order to avoid decompression sickness of divers.

A DPV has its basic features of a watertight casing that is pressure-resistant that contains an electric motor being battery powered, that leads to driving a propeller. Some factors are considered in the design of this vehicle, and these are that it cannot harm the diver, diving equipment, marine life, and that it cannot run away from the diver or accidentally started, and the vehicle is to remain neutrally buoyant while being used underwater.

DPVs are typically used in cave diving and technical diving where the vehicles serve as a help in moving bulky equipment and thus allowing the diver to make better use of the limited underwater time as stated by the decompression requirements for deep diving. There are also DPV accessories that can be attached onto the DPV accessory board and these can make the DPV more useful. These accessories are dive gears like compasses, cameras, lobster sticks and even spear guns.

The delivery of combat divers and their equipment over speeds or distance that are deemed impracticable are being made possible with the use of DPV for military applications.

Know that the use of DPV is more than simple swimming, but requires depth control, buoyancy adjustment, monitoring of breathing gas, and navigation.

There are several types of DPV, and the most common type is that which tows the diver while holding onto the handles on the stern or bow. With the diver placed parallel to and above the propeller wash, this tow-behind scooter is at its most efficient operation.

The next kind of DPV is termed manned torpedoes, shaped like a fish, where the one or more divers can sit typically astride on it or in hollows inside.

The next kind of DPV is called a subskimmer which is described as a rigid-hulled inflatable boat, powered by a petrol engine when on the surface, and when being submerged, the petrol engine is sealed and the vehicle runs on battery-electric thrusters being attached on a steerable cross arm.

Note that as DPVs get bigger, they are now merged into submarines. There are also small submarines called wet subs, where the pilot’s seat is flooded that then requires the diver to wear diving gear.