[bartislartfast]

> A Broken Arrow is defined as an unexpected event involving nuclear weapons that result in the accidental launching, firing, detonating, theft, or loss of the weapon.

and then

> The CIS (Commonwealth of Independent States) "Oscar II" class submarine, Kursk, sinks after a massive onboard explosion. Attempts to rescue the 118 men fail. It is thought that a torpedo failure caused the accident. Radiation levels are normal and the submarine had no nuclear weapons on board.

I don't understand how this is on the list, if it had no nuclear weapons on board.

[jonwachob91]

>>> I don't understand how this is on the list, if it had no nuclear weapons on board.

The Oscar II class submarine is a nuclear powered submarine.

[bartislartfast]

their own definition, on the top of the page:

> an unexpected event involving nuclear weapons

the term "broken arrow" refers to the launchable weapon itself. there were literally no "arrows" involved in this event.