Corvus (boarding device)

Roman corvus boarding plank
Boarding-bridge diagram

The corvus (Latin for "crow" or "raven") was a Roman ship mounted boarding ramp or drawbridge for naval boarding, first introduced during the First Punic War in sea battles against Carthage. The name is figurative after the beak-like iron hook that is said to have sat at the far end of the bridge, intended to anchor the enemy ship.