P = P0 + rho*g*h
1 atm + (1025 kg/m^3 * 9.8 * h)/101325
Hydrostatic pressure grows roughly 1 atmosphere every 10 metres. This 2D side-view redraws the same pressure/thruster/lighting trade-off as the 3D ROV: the hull outline compresses visually as stress rises, the floodlight cone shrinks the dark water around it, and marine snow drifts past at a rate set by depth.
- Depth — sets hydrostatic pressure and hull stress; battery drains faster as thrusters fight compression and cold.
- Thruster Power — spins the twin thrusters faster, increasing speed and battery drain.
- Light Intensity — floodlight brightness; visibility stat approximates how far light penetrates the dark water.
- Hover / Patrol — switches between station-keeping and a lateral survey sweep.
- Deploy Arm — extends the manipulator arm used for sampling, mirroring real ROV science tasks.
Real-world use: ROVs like Jason and Hercules use exactly this pressure/thruster/lighting trade-off to explore hydrothermal vents and shipwrecks over 4000 m deep.