noun
diving apparatus; diving equipment
General term for equipment used for underwater diving, such as scuba gear or diving bells.
彼は新しい潜水器を買って、海に潜った。
He bought new diving equipment and went diving in the ocean.
Loanword for scuba, often used for modern self-contained underwater breathing apparatus, whereas 潜水器 can include older or more general equipment.
Compound of 潜水 (diving) + 器 (device, instrument).