A casualty has cut himself severely with a sharp fishing knife and the wound is spurting bright red blood. state what vessel has mostly likely been damge.?

The spurting bright red blood indicates that the casualty has likely damaged an artery, specifically a major one like the radial or brachial artery, depending on the location of the wound. Arterial bleeding is characterized by its bright red color and rhythmic spurting, which correlates with the heartbeat. Immediate medical attention is necessary to control the bleeding and assess the extent of the injury.