person who works underwater using diving equipment; diver or frogman

submarine; a vessel designed to operate underwater for military, engineering, or scientific purposes

Underwear or suit worn for underwater work or activities; usually includes items like the suit, boots, and headgear and may include oxygen storage.

A water-pumping machine where the electric motor and pump are integrated into a single unit designed to operate while submerged in water

diving suit; wetsuit

a person who stays underwater for work or sport; diver; plunger

a bell-shaped diving chamber used for underwater work such as deep-sea salvage, exploration, and rescue; it is equipped with systems for breathing, temperature control, and communication

the upper surface of the underground zone of saturation

the upper surface of an underground zone of saturation or aquifer

decompression sickness; a condition where gas bubbles form in the blood or tissues when a diver rises to the surface too quickly

freediving; skin diving

diver; frogman

A knife carried while diving for defense or removing obstacles, such as cutting through fishing lines or nets.

decompression sickness; a condition caused by a rapid change in pressure, often experienced by divers

a person who works underwater, often wearing a diving suit; also known as [[潜水员|潛水員|qian2 shui3 yuan2]] or [[蛙人|蛙人|wa1 ren2]]

decompression sickness; the bends

An explosive device designed to travel through water to attack submarines.

a spherical deep-sea submersible used for underwater observation; bathysphere or benthoscope

scuba gear used by divers, specifically a tank containing compressed air or oxygen for breathing underwater

protective eyewear used for swimming and underwater diving

scuba diving that involves more complex equipment or procedures than standard recreational diving