What's the noun for submerged? Here's the word you're looking for.
submersible
(Britain) A small nonmilitary, non-nuclear submarine for exploration.
(Britain) A retroactive term used for non-nuclear submarines; nuclear submarines are termed "true submarines".
(Britain) A term used primarily by some navies for nuclear submarines, termed "true submersibles", because they cannot retroactively declare that their non-nuclear submarines should be called by a different name.
(US) A very small "baby" submarine designed for specific localized missions, usually while tethered to a submarine or ship for life support and communications. Slang synonyms: midget-submarine, anchor.
“The same applicator can be used for many different products because it easily changes from a submerger unit to one with a multi-curtain batter fall and underflow pump.”