Disablement (Use of Force)

Disablement is the calibrated application of force to stop a non-compliant vessel by damaging its propulsion or steering rather than sinking it or killing the crew. It sits high on the use-of-force continuum, after hail, signals, blocking maneuvers, and warning shots have failed, and is typically delivered as aimed fire at the rudder, propeller, or engine spaces. Lawful disablement requires authorization under the operation’s rules of engagement and must satisfy necessity and proportionality; the SUA Convention 1988 framework and constabulary use-of-force standards (the M/V Saiga case, ITLOS 1999) treat lethal or excessive force against a fleeing merchant vessel as unlawful.