When the US Navy accused Russia of "unsafe and unprofessional" behavior at sea after a dangerous close encounter between a Russian destroyer and a US cruiser June 7, 2019, Russia quickly released a statement countering the US version of events.
Each side blamed the other for the run-in — which was close enough for US sailors to spot sunbathers topside on the Russian ship. But an expert who viewed the US Navy's images concluded the Russians were to blame for the near-collision and were "operating in a dangerous and reckless fashion."
The US Navy says the Ticonderoga-class cruiser USS Chancellorsville and the Russian destroyer Admiral Vinogradov nearly collided when the Russian ship sailed as close as 50 feet off the US Navy vessel while it was recovering a helicopter in the Philippine Sea. Russia claims that the USS Chancellorsville put itself on a collision course with the Russian ship in the East China Sea, where the two warships came within 50 meters (150 feet) of one another.
"While USS Chancellorsville was recovering its helicopter on a steady course and speed when the Russian ship DD572 maneuvered from behind and to the right of Chancellorsville accelerated and closed to an unsafe distance of approximately 50-100 feet," 7th Fleet said in a statement, adding that the US warship was forced to execute all engines back full and to avoid a collision.
The US Navy cruiser USS Chancellorsville (CG 62), right, is forced to maneuver to avoid collision from the approaching Russian destroyer Admiral Vinogradov (DD 572), closing to approximately 50-100 feet putting the safety of her crew and ship at risk.
Russia responded with its own statement, pinning the blame for the close call on the US Navy.
"The US cruiser Chancellorsville suddenly changed its course and crossed the Admiral Vinogradov destroyer's course some 50 meters away from the ship," the Russian Pacific Fleet said. "In order to prevent a collision, the Admiral Vinogradov's crew was forced to conduct an emergency maneuver."
Russian media has invoked the rules of the road, arguing that a vessel approaching another ship on its starboard, or righthand, side has the right of way. Indeed, that is the rule for a routine crossing situation, but there's more going on here.
The US Navy released photos and videos. Based on these, a retired US captain concluded that the US Navy cruiser had the right of way — and Russia was at fault.
"If the cruiser was actually conducting helicopter operations. That trumps everything," explained retired Capt. Rick Hoffman, who commanded two US warships. "If she's operating a helicopter, she's constrained and permitted by the rules of the road to maintain course and speed. She has the right of way."
In this situation, the USS Chancellorsville is considered a "vessel restricted in her ability to maneuver." A ship in this category is "a vessel engaged in the launching and recovery of aircraft," according to the internationally-accepted navigation rules for preventing collisions at sea.
Near collision between Russian destroyer and US cruiser.
(US 7th Fleet)
Furthermore the Russian destroyer appears to have been approaching from behind (astern) at high speed at an angle that would make this an overtaking rather than a crossing. In that scenario, the vessel being overtaken (the US warship) has the right of way.
The Russian ship "was clearly approaching from astern, clearly maneuvering to close the cruiser, and was clearly in violation of the rules of the road and putting the ship at risk," Hoffman said. "The Russians were clearly operating in a dangerous and reckless fashion."
He added that the wake indicated the "Russians had altered course several times," more proof that the destroyer was purposefully closing with the US cruiser.
Another possible sign that this may have been a planned provocation on the part of the Russians is that there were sailors sunbathing on the helicopter pad. Were the Russian naval vessel actually concerned about a possible collision, there would have almost certainly been an all-hands response.
The ships alarm would likely have sounded, and sailors would have been ordered to damage control stations or braced for impact.
Close encounters like the one involving the USS Chancellorsville and the Admiral Vinogradov are particularly dangerous because a ship is hard to maneuver at close range and a steel-on-steel collision can damage the ships and kill crewmembers.
"Unlike a car, a ship doesn't have brakes, so the only way you can slow down is by throwing it into reverse," Bryan Clark, a naval affairs expert and former US Navy officer, explained to BI recently. "It's going to take time to slow down because the friction of the water is, of course, a lot less than the friction of the road. Your stopping distance is measured in many ship lengths."
A US Navy cruiser is 567-feet-long and unable to move its hull right or left in the water very quickly, making a distance of 50 feet dangerous.
"When someone pulls a maneuver like that," he added, "It's really hard to slow down or stop or maneuver quickly to avoid the collision."
This article originally appeared on Business Insider. Follow @BusinessInsider on Twitter.
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