Method 4.8.19 is a tear strength test that determines the ability of elastomeric jacketing material to withstand the propagation of a cut passing through a portion of its length.
The specimen consists of a piece of jacketing material cut to the dimensions specified in ASTM D470. Specimens are removed from the completed cable, and a minimum of six specimens are required.
The test evaluates the resistance of the jacket material to tearing, which is important for cable survivability during installation, maintenance, and service aboard naval vessels where cables may be subjected to mechanical damage.