MППСС (ППСС) v1.3.2 APK (Unlimited Money)

COLREGs - International regulations for preventing collisions. This is the basic set of Maritime rules governing the shipping.

From wiki
PSS Rules adopted prior to 1974, were only Advisory in nature, the execution is COLREG-72 is required on the basis of an international agreement. Under Rule 2, nothing in the COLREGs could not release neither the ship nor the owner, nor the captain, nor the crew from responsibility for the consequences that may occur from the failure of COLREG-72. Dangers of navigation and collision under special circumstances, including characteristics of the vessels) can cause the need to deviate from COLREGs to avoid immediate danger. Rules apply only in cases where there is a danger of collision. If vessels are in sight of each other and follow such courses and such speeds that it does not create a threat to the movement or risk of collision — rule not used.
COLREGs apply to all vessels at sea and connected with it the water which can float ships. However, the relevant authorities of the coastal state may establish special rules of navigation in inland waters (such as PWP in Russia), the international Convention States that they must be close to the COLREGs as possible. Thus the knowledge of the COLREGs is essential for the Navigator.