1. capable of being submerged or operating underwater

1. a small underwater vessel used for deep-sea exploration or research

Examples

• The submersible pump can operate completely underwater.
• Scientists used a submersible to explore the ocean floor.
• The research submersible descended to a depth of 3,000 meters.
• This submersible camera is designed for underwater photography.
• The deep-sea submersible discovered new species near the thermal vents.
• All electronic equipment must be submersible for this marine expedition.
• The submersible vessel carried three crew members to the wreck site.