| ENGLISH | ITALIAN | |
| carrying handle | carrying handle | |
| quarries | cave | |
| certified diver | patented diver | |
| check valve | valvola di non ritorno | |
| chest strap | sternal strap | |
| chest zip | sternal hinge | |
| chin zip | zipper on the face | |
| cleaned gas; scrubbed air | purified air | |
| CO2 absorbent canister | purification basket | |
| cold | cold | |
| cold water | cold waters | |
| computer wet contacts | wet computer contacts | |
| contaminated water | polluted waters | |
| corrective lenses | corrective lenses | |
| corrugated hose | corrugated pipe | |
| counterlung | lung sac | |
| current depth | current depth | |
| D ring | D-ring | |
| decompression sickness | decompression sickness (DCS) | |
| decompression stop | decompression stage | |
| decompression table | decompression table | |
| decompression stop depth | stage depth | |
| decompression-stop diving | off-the-curve dive | |
| deflator button | flush button | |
| demand lever | dispensing lever | |
| depth gauge | depth gauge | |
| desaturation time | desaturation time | |
| diagonal front zipper | diagonal front zipper | |
| DIN fitting | DIN connection | |
| DIN safety whistle | DIN standard whistle | |
| dive computer | computer | |
| dive time | duration of the dive | |
| diving certification | scuba diving license | |
| dolphin kick | dolphin kick | |
| double-lined neoprene | double lined neoprene | |
| dry suit | dry suit | |
| dry zip | waterproof zipper |
