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Convention (III) for the Adaptation to Maritime Warfare of the Principles of the Geneva Convention of 22 August 1864. The Hague, 29 July 1899.
Art. 5. The military hospital ships shall be distinguished by being painted white outside with a horizontal band of green about a metre and a half in breadth.
The ships mentioned in Articles 2
shall be distinguished by being painted white outside with a horizontal band of red about a metre and a half in breadth.
The boats of the ships above mentioned, as also small craft which may be used for hospital work, shall be distinguished by similar painting.
All hospital ships shall make themselves known by hoisting, together with their national flag, the white flag with a red cross provided by the Geneva Convention.