intervention duty.Maritime law. A shipowner’s obligation to remedy hazardous working conditions for longshore workers, even though the shipowner did not create the condition, when the shipowner knows of a nonobvious condition arising in an area that cannot be avoided by the longshore workers in performing their duties. Cf. ACTIVE-OPERATIONS DUTY; TURNOVER DUTY. [Cases: Shipping 84(3).]

[Blacks Law 8th]