Deep sea pressure based projectile launching system

A projectile launching apparatus, comprising:

• a launch barrel, partially within a water body, to engage a projectile;
• a plurality of hinged doors along a length of the launch barrel;
• a movable piston, wherein the projectile is placed on the movable piston;
• a plurality of piston locks, wherein
• the plurality of piston locks includes a first set of piston locks at a bottom of the launch barrel and a second set of piston locks at a top of the launch barrel, and
• the first set of piston locks is configured to hold the piston at the bottom of the launch barrel before launch of the projectile;
• a control unit configured to control the plurality of hinged doors to an open position, wherein
• in the open position of the plurality of hinged doors, water from the water body flows into the launch barrel to apply pressure on the piston,
• the piston is configured to move upwards along the length of the launch barrel from the bottom of the launch barrel to the top of the launch barrel based on the pressure applied by the flowing water on the piston from the water,
• the projectile is launched from the launch barrel based on the movement of the piston from the bottom to the top of the launch barrel, and
• the second set of piston locks is configured to hold the piston at the top of the launch barrel after the launch of the projectiles
• a plurality of inlets in the launch barrel;
• and
• a water pump at the bottom of the launch barrel, wherein
• the water pump is configured to pump the water out of the launch barrel through the plurality of inlets after the launch of the projectile, and
• after the launch of the projectile from the launch barrel, the piston is further configured to move downwards from the top of the launch barrel towards the bottom of the launch barrel based on the pumping out of the water from the launch barrel.