TUNNEL ENTRANCE

Question 1

How do you use emergency protection when entering a tunnel before you reach the full protection distance (1 1/4 mile)?

Answer 1

Place 3 detonators inside the tunnel and continue through the tunnel to the far end and place three detonators there.

Question 2

If the protection distance is inside the tunnel, what must you do?

Answer 2

Continue through the tunnel to the far end and place 3 detonators there.