The manual backup was used to lay the gun, since the hydraulic control was too coarse.

Turret rotation was by electric motor under the gunner's control with a hand-wheel for manual backup.

Leaning slightly toward Dan, Duncan said, "It's set to ignite automatically, although we have the manual backup ready."

Automated backup and scheduling should be considered, as manual backups can be affected by human error.

I definitely think we should go to full manual backup on call for fire and movement orders.

They'd quickly realize their manual backup had been destroyed, so they couldn't turn off the countdown.

The cannon is slewed by hydraulic-electrical system, with a manual backup.

The turret is hydraulic with manual backup, and has 360 degree rotation with elevation limits of -4 to +70 degrees.

This automatic 5 cm mortar could fire a maximum of 120 grenades a minute, and was electrically operated, with manual backup.

In the BMP, the gun is brought to bear by an electric motor, with a manual mechanical backup.