divemaster

[dahyv-mas-ter, -mah-ster]
noun
  1. a professional qualified to oversee scuba diving operations, as in salvage work or at a resort, and responsible for procedures and safety, monitoring the whereabouts of divers underwater or at the surface, and making rescues when necessary.

Origin of divemaster

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018