217 ships

That's how many ships currently in the US Navy.

Well, actually no.

I didn't count the uncommissioned ships, the ships under construction, ships under the MSC, boomers and things like mine sweepers/hospital ships/etc. I did count all the ships related to amphibious warfare including landing docks and command ships.

Why, you may ask?

Out of all those ships, 4 have sunk an enemy ship.

1 of them is the USS Constitution, so it doesn't really count.

2 of them (USS Porter and USS Carter Hall) sunk little pirate skiffs off of Somalia.

That leaves the USS Simpson, which sunk a Iranian missile patrol boat during the Iran-Iraq war. The only active USN warship to have sunk another warship.

...

Maybe all those people who want to modernize the Iowas ought to think about that.

edit: On a similar note, 20 Bradleys were lost during the first Gulf War. 3 were due to enemy fire, 17 were due to friendly fire. Who needs enemies when you have teammates like that?