(1)The master of an Indian ship on receiving at sea a signal of distress or information from any source that a vessel or aircraft is in distress shall proceed with all speed to the assistance of the persons in distress (informing them if possible that he is doing so) unless he is unable or in the special circumstances of the case considers it unreasonable or unnecessary to do so or unless he is released from such obligation under the provisions of sub-section (3) or sub-section (4).