He felt for his survival knife; it too was gone, ripped off by the vortex.

Military units issue some type of survival knife to pilots in the event their plane may be shot down.

Randall made the changes and the result was the first of the modern survival knives.

More to the point, should you have bought more than one survival knife?

The severed electrical cords and survival knife told another story.

How is it he ended up with the survival knife?

Why should the survival knife on the desk have mattered to him?

He could see the survival knife on her desk.

The survival knife found in his attic, which turned out to be the murder weapon.

In this case, their function is similar to a survival knife.