Keelhauling is an antiquated form of naval punishment in which an individual is tied with a rope that loops under the ship, and then thrown overboard. The person is hauled under the ship's keel, either from one side of the ship to the other, or vertically from bow to stern. The hull of a ship is typically covered in sharp barnacles and other marine growth, and therefore this punishment often resulted in severe lacerations, potentially leading to drowning or death from shock. Originally practiced by the Dutch in the 16th century, this penalty was primarily imposed for serious offenses committed by the crew members such as mutiny.

1. In the 1700s, a young sailor was caught stealing from the ship's loot, and the captain took it upon himself to enforce the draconian discipline of keelhauling, subjecting the offender to a terrifying and perilous trip under the ship's keel. 2. After a severe mutiny onboard, the captain decided to exact a fierce punishment; he sentenced the leader of the insurrection to a keelhauling, pulling him from one side of the ship to the other, under its sturdy wooden keel. 3. Pirates were infamous for employing cruel and unusual punishments to keep their unruly men in line, with keelhauling being one of them - the victim would be tied to a rope and thrown overboard, with the other end of the rope fastened on the opposite side of the ship, forcing him under the sea and across the ship's barnacle-encrusted keel. 4. In an attempt to deter insubordination among his crew, the iron-fisted captain used keelhauling as punishment; the evildoer was tied to a rope and forcibly dragged under the ship’s grating keel where they’d be cut and bruised by the sharp objects that stuck to the bottom of the ship. 5. The sailors on the ship lived in perpetual fear of committing any wrongdoing as the captain was known for his merciless nature and his notorious use of keelhauling, an unbearable punishment that involved dragging the offender under the rough, wooden keel of the full-rigged ship.

Keelhauling, an execution method employed in the maritime world, was one of the most feared punishments in the golden age of piracy. This gruesome method was first recorded in the laws of the Dutch navy in the late 16th century. It involved the convicted sailor being bound by ropes and then thrown overboard, dragged along the keel, which is the lengthwise structure along the base of a ship. This process was not only meant to drown but also to severely lacerate the victim because barnacles, known for their sharp, rough edges, usually covered the underside of a ship. A horrifying spectacle, keelhauling was intended to serve as a powerful deterrent against mutiny or any other form of insubordination. Despite its brutality, it was seldom used due to its complex setup and devastating effect on crew morale. It's been hundreds of years since it's last known usage, and this brutal punishment has thankfully remained in the annals of maritime history.