When pirates tried to board a merchant vessel off the coast of the Philippines, the crew defended their ship like a castle, throwing boiling oil and water at the invaders. They succeeded in fending off the buccaneers, but this battle highlights the variety of desperate, homebrewed anti-pirate measures that some boat crews must employ to prevent capture—or worse.
Grappling hooks, boiling oil, the works: piracy is, shockingly, on the rise around Indonesia/Malaysia. For a given value of ‘shockingly:’ if you’re familiar at all with naval history you might be muttering right now Wait, piracy has been suppressed in that region lately? That area’s been a pirate haven for a long time, and it looks like it’s back to being one again. And it’ll probably stay one until some Great Power decides to keep a cruiser squadron in the area to do anti-pirate duty.
Which was, by the way, a nasty yet necessary job. In the past, it often involved literally burning out pirate havens. Which is probably one reason why nobody’s jumping all over themselves to take on that particular responsibility.