As you can see, such a vessel is not much of a runabout, but for cryin' out loud, the pirates who are commandeering these commercial vessels are doing so from dinghies, pulling alongside the lumbering ships, and boarding via grappling hooks and rope ladders.
Why in the world are the ships' owners not arming their crews, or positioning mercenaries aboard to thwart these would-be Jack Sparrows? After all, even if they don't eventually lose their shipments, the time value of money on the goods in transit (in the case of the oil tanker, said to be around $100 million), and the payroll for the crew, add up to quite a tidy sum.
We think it would be a great idea, and great fun, to staff a few of these ships with a few good men (possibly women too, we're equal opportunity), armed with the following varmint rifles:
The top one, a Vulcan .50 cal, could put a few dents in the pirates' dinghies, while the AR-30 in .338 Lapua and the SU-16 could be used if the miscreants actually succeeded in boarding. We think a few well-publicized rounds of 'prairie dog' shooting, complete with empty dinghies floating off the African coast, might persuade up-and-coming pirates to return to fishing or basket weaving.