When the snag maneuver is used on a rear wheel drive vehicle such as this Suburban, the opposite wheel locks up as well. Many Chevy pickups and SUVs have the Eaton G80 differential that makes this possible. No tether needed in this pursuit.
Stopping a front wheel drive vehicle: Using a net to lock the rear wheel of a front wheel drive vehicle will only slow it down and flatten the tire. The vehicle may still travel at higher speeds. If stopping the suspect is vital in protecting the public, the tether option should be used.
Extreme caution and adequate training is important when using this device especially on an uneven surface such as a dirt road! Watch as the wheel that isn't locked up breaks traction slowing the vehicle to a stop.
An officer can bring a suspect vehicle to an absolute stop in a matter of seconds while choosing the 'Tether' option. With the flip of a switch before, during or after deployment, the tether is releasable allowing the officer to create further distance from the suspect.