What type of line does a helitac crew typically cut?

A helitac crew typically cuts a scratch line, which is a preliminary line created in the early stages of fire suppression efforts. This line is used to help firefighters access the fire area and to establish control over the fire's spread. By cutting a scratch line, the crew effectively removes combustible materials, allowing for a quicker response to the fire and enhancing safety for the personnel involved. This type of line may not be as defined or secure as other types of lines, such as containment lines, but it plays a crucial role in initial fire attack operations.

In contrast, support lines are established as a secondary method of backing up containment efforts, and containment lines involve more thorough preparation and should be able to hold the fire. A primary line is more commonly associated with a stronger and more definitive boundary. Scratch lines are essential for rapid access and initial action, which is why this option is the correct answer.