Related Rule
Ecuador
Practice Relating to Rule 12. Definition of Indiscriminate Attacks
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.
Ecuador’s Naval Manual (1989) states: “The use of weapons which by their nature are incapable of being directed specifically against military objectives, and therefore that put noncombatants at equivalent risk, are forbidden due to their indiscriminate effect.” 
Ecuador, Aspectos Importantes del Derecho Internacional Marítimo que Deben Tener Presente los Comandantes de los Buques, Academia de Guerra Naval, 1989, § 9.1.
The manual further specifies:
Weapons that are incapable of being controlled in the sense that they can be directed at a military target are forbidden as being indiscriminate in their effect … A weapon is not indiscriminate simply because it may cause incidental or collateral civilian casualties, provided such casualties are not foreseeably excessive in light of the expected military advantage to be gained. 
Ecuador, Aspectos Importantes del Derecho Internacional Marítimo que Deben Tener Presente los Comandantes de los Buques, Academia de Guerra Naval, 1989, § 9.1.2.