gun-layer

Now all depended on whether the gun-layer had judged the elevation right.

Sharpe's Battle Cornwell, Bernard 1995

The safety of the aviator under these circumstances depends upon his maintaining an altitude exceeding the range of the guns below, the most powerful of which have a range of 8,000 to 10,000 feet, or on speed combined with rapid twisting and turning, or erratic undulating flight, rendering it extremely difficult for the gun-layer to follow his path with sufficient celerity to ensure accurate firing.

Aeroplanes and Dirigibles of War Frederick Arthur Ambrose Talbot

At any rate, under the lash of his tongue, the gun's crew soon got into action, the gun-layer taking charge.

The Diary of a U-boat Commander With an Introduction and Explanatory Notes by Etienne Stephen King-Hall 1929

In the midst of his torrent of abuse directed upon the luckless gun-layer, Kapitan Schwalbe suddenly stopped.

The Submarine Hunters A Story of the Naval Patrol Work in the Great War Edward S. [Illustrator] Hodgson 1917

I was interested in watching the gun-layer as he readjusted the dragon mouth.

Cinderella in the South Twenty-Five South African Tales Arthur Shearly Cripps 1910