staff captain

a person who assists the master of a large ocean passenger vessel, being especially responsible for safety apparatus, fire and lifeboat drills, etc.

Origin of staff captain

First recorded in 1865–70

Not one of us has any money, and we are all in debt to that staff-captain whom you saw there.

Sevastopol |Lyof N. Tolsto
His elder brother had entered the same service as his father, the other brother was a staff-captain of engineers.

A Book of Remarkable Criminals |H. B. Irving
I seized the papers and lost no time in carrying them away, fearing that the staff-captain might repent his action.

A Hero of Our Time |M. Y. Lermontov
The Prince of Wales was a staff-captain in the army of the Somme doing his bit in the mud and misery like the rest of us.

"Over There" with the Australians |R. Hugh Knyvett

On their return from the trenches they met the staff-captain, who hailed them, and said, Are you the tunnelling company?

The History of the 51st (Highland) Division 1914-1918 |Frederick William Bewsher