EXAMPLES FROM THE WEB FOR BACK-UP
Which is where I gets a frown and a back-up signal from Vee.
After some thought, he took the .450 bear gun he used for back-up when guiding.
The conductor signaled to back-up and stop, and took him on.
It is safer to take down also the back-up strap and rod on that side.
Dan had carried in an arm load of books which Fitch indicated should be arranged, back-up, on the floor beside him.
Similar emergency lights and back-up white light strips adorned Beulah's stern.
To set a go-ahead eccentric, use the back-up one on that side for the marker.