Answer: divingbell

AnswerCrossword Clue
DIVINGBELL

One of 63 Across's ideas

DIVINGBELL

Device used in marine salvage

DIVINGBELL

Underwater research vessel

DIVINGBELL
Underwater search vessel
DIVINGBELL
Relative of a bathysphere
DIVINGBELLVessel for underwater work
DIVINGBELLAquanaut's chamber