Related Rule
Practice Relating to Rule 146. Reprisals against Protected Persons
Section B. Wounded, sick and shipwrecked in the power of the adversary
The Hellenic Navy’s International Law Manual (1995) provides: “In the context of armed conflict, reprisals are prohibited … against shipwrecked, wounded and sick.” 
Greece, International Law Manual, Hellenic Navy General Staff, Directorate A2, Division IV, 1995, Chapter 4, § 7(a).