🌊🧱⚡🚢

#hydroelectric power #reservoir #yangtze river dam #ship lift #water control

🚢⬆⬇️🚢

#canal locks system #water level change #ship elevation #gatun locks #miraflores locks #ship lift

⚓⬆️🧱

#ship lift #dock structure #graving dock #shipyard #out of water

🌊🚫🚢🏗️

#drydocking #ship lift #vessel dry dock #marine engineering #shipyard operations #water removal