This International Standard specifies, for ropes of different kinds, a method of determining each of the following characteristics: - linear density; - diameter; - lay length; - braid pitch; - elongation; - breaking force. The linear density, lay length and braid pitch are measured with the rope under a specified tension called the reference tension, as specified in Annex A. The elongation corresponds to the measured increase in length of the rope when the tension to which it is subjected is increased from an initial value (reference tension) to a value equal to 50 % of the mínimum specified breaking strength of the rope. The breaking force is the maximum force registered (or reached) during a breaking test on the test piece, carried out on a tensile testing machine with constant rate of traverse of the moving element. The breaking force values given in the tables of rope specifications are only valid when this type of testing machine is used. When it is not possible to test the rope in full size, the method described in Annex B can be used, subject to agreement between the parties involved. This International Standard also provides a method for measuring water repellence, lubrication and finish content, when requested by the customer.