A couple points from the article:
7. Amir Mousavi, a former advisor to the defense minister, said that Iran has the necessary knowhow to enrich uranium to the 50-60% level needed to fuel nuclear ships and submarines, but added that it was prepared to discuss Western demands if the West recognized its right to develop civilian nuclear technology.
8. The Iranian website Fa.irannuc.ir, which is close to Iran's team of nuclear negotiators, claimed, "Producing [nuclear] fuel for submarines and ships entails raising the level of enrichment beyond 20%. However, it is extremely important to note that this is an entirely civilian move, as, according to the NPT, Iran has the right to enrich [uranium] to any level it wishes, for civilian use. This [comes as] a direct response to Europe and the U.S.'s recent sanctions against Iran..."
Sounds like they are acknowledging having the capability to do so, not necessarily planning to. But like I said, who even knows anymore.