NFPA 1983 Throwline Performance Requirements
Minimum Breaking Strength of 13 kN (2,922 lbf)
Minimum diameter of 7 mm (7/64 in) and a maximum diameter of 9.5 mm (3/8 in)
After a 24-hour immersion in water, the entire length of the throwline must float to the surface within one minute.
Throwlines: A Safe Choice
A throwline bag is the safest way to reach a subject in fast-moving or still water. It provides a downstream safety backup when rescuers must enter the water. Throwline bags should be kept in patrol cars, ambulances and other emergency response vehicles.