A hawser is a thick, heavy rope or cable used to tie up or tow large ships. Picture a rope as thick as your leg, strong enough to hold a massive ocean liner in place at the dock or pull another ship through the water.

Hawsers are made from incredibly strong materials like steel cable or specially woven fibers. They have to be: a cargo ship might weigh 100,000 tons, and a single hawser needs to handle that enormous pulling force without snapping. When you see a huge ship tied to a dock, those thick ropes looped around massive metal posts (called bollards) are hawsers.

The work of handling hawsers is dangerous. If a hawser under tremendous tension suddenly breaks, it can snap back like a giant whip with serious force. Sailors handling hawsers stay alert and know where to stand to avoid the snap-back zone where a broken cable might strike.

In the age of sailing ships, crews would secure their vessels with hemp hawsers as thick as a person's arm. Today's steel hawsers are even stronger, but they serve the same essential purpose: keeping massive ships exactly where they need to be.