Editor's note: This article was initially published at 6:37 p.m., EDT, on April 13 and has been updated.

Russian pilots rattled nerves aboard the destroyer Donald Cook, this week after ​buzzing within yards of the ship in the Baltic Sea. flying multiple low passes close to the ship​Provocative, sure. But they weren't a credible threat. While annoying, a former surface warfare skipper told Navy Times, that doesn't amount to a credible threat, and that's why Cook's commanding officer made the right choice to not engage.

So concludes a retired Navy commanding officer, who reviewed photos and videos from the run-ins on Monday and Tuesday, when Over the course of two days, twice an ​unarmed Sukhoi Su-24 fighters jet ​flew within 1,000 feet of the ship — once coming as close as 30 feet in what U.S. officials called "simulated attacks."  and just 30 feet above the water, totaling about 30 passes, a defense official told Military Times on Wednesday. And ​On Monday, a low-flying Russian Ka-27 Helix helicopter also appeared to take photos of the ship, he said​. 

Cmdr. Charles Hampton, the Donald Cook's CO, characterized the "simulated attacks" as "unsafe and unprofessional," the official added. 

While the flybys were "Well, we’re not at war with Russia," Capt. Rick Hoffman said. "It would be one thing to be operating and have a threatening attack profile from someone who might not recognize me — that’s not the case here."

If you have visual identification of the jet, can see it isn't carrying weapons, and don't detect any electronic emissions suggesting there was a missile lock

ed

​ on the ship, there's nothing to be done.

And ultimately,

the

​the rules of engagement allow the CO to take defensive action if they feel they safety of their vessel is in danger, according to U.S. European Command spokesman Capt. Danny Hernandez told Navy Times. In this case the CO did not feel threatened, he added.

put the CO in charge of how to respond.

"You don’t get to kill people just because they’re being annoying," said Hoffman, who commanded frigate DeWert and cruiser Hue City. Cruisers are the fleet's foremost air defense platform and are tasked with guarding flattops from incoming threats.

There's a possibility that the

However, the defense official said, the

​"simulated attack"

posture

​might violate a 1973 treaty between the U.S. and Russia that deals with this behavior

, and might prompt the U.S. to file a formal complaint with the country

​.

Otherwise, Hoffman added, it just amounts to showboating.

"Only in 'Top Gun' does a war suddenly break out between two airplanes that is completely not related to something going on ashore," he said.

To be sure,

On the other hand,

​the rules might be different in another situation.

Russia is still an ally and

​The Baltic Sea is not a contested area of responsibility.

"We would probably not have accepted that from an Iranian aircraft in the Persian Gulf, although we’ve seen it," Hoffman said.

Or if it had been a civilian aircraft, he added, the CO would have been

much

​more on guard for a potential suicide mission. But the likelihood that a rogue Russian pilot would take a shot at an American ship and then try to fly home through the airspace of multiple NATO partners is very low.

It's more likely that the stunt will end up as a public relations tool for Russian President Vladimir Putin, showing force against the Americans operating in his backyard.

"It would be real interesting to see what shows up in the Russian papers in the morning, how they play it," Hoffman said. "It's not that different from North Korea. He does something and then he plays it domestically however he needs to play it for the purposes of getting his people energized."