For each ship equipped with anchor devices shall be selected them according to the ratio of equipment number calculated for a given vessel individually by the relevant rules. On this basis is selected the length of anchor chains, the number and weight of anchors and the chain calibre chain and its tensile strength. Calculations are made on the basis of the relevant Classification Society and submit for approval to the Society. On the basis of these calculations to be selected other anchor equipment (winches, hawse pipes, chain locker etc.) and properly fastened to the deck.