Règle correspondante
Practice Relating to Rule 12. Definition of Indiscriminate Attacks
Section A. Attacks which are not directed at a specific military objective
Ecuador’s Naval Manual (1989) states: “Any weapon may serve an unlawful purpose when it is directed against noncombatants and other protected persons and objects.” 
Ecuador, Aspectos Importantes del Derecho Internacional Marítimo que Deben Tener Presente los Comandantes de los Buques, Academia de Guerra Naval, 1989, § 9.1.