A privileged claim on the property of another (usually a ship) which arises with a maritime claim in respect of damage caused by it or a service performed to it, and which survives its conventional sale (but not its judicial sale), and which may be enforced by its arrest, and which remains in place until either satisfied or time-barred. When enforced, it gives the claimant’s claim priority in ranking over most other claims, including ship mortgages.