a boat used as a tender for divers or others working under water.
Origin of diving boat
First recorded in 1795–1805
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for diving boat
What Fulton did in England with his diving-boat; what he said about America.
Fulton goes to England and to France; his iron bridges; his diving-boat, and what he did with it in France.
While he was in France he made what he called a diving-boat.