When should caution be exercised concerning work performed over the side of a ship?

Caution needs to be exercised when the ship rolls beyond 10 degrees because significant rolling can affect the stability and safety of personnel working over the side. At this angle, the risk of accidents increases due to the potential for slips, falls, or equipment failure, particularly in situations where workers are engaged in tasks that require them to lean over or balance on the edge of the vessel. Maintaining a safety protocol during such conditions is vital to prevent injuries or loss of equipment.

While low visibility, nighttime operations, and rough seas are also factors that warrant caution, the specific degree of roll is a critical indicator of immediate risk and can have more acute consequences in terms of operational safety over the side.