Russian Su-27 Flanker performs dangerous intercept putting itself within 10 meters of Swedish ELINT plane

Oct 02 2014 - 18 Comments

One again, Russian Su-27s have been involved in a dangerous close encounter with a plane they have intercepted.

The Swedish Air Force operates a pair of Gulfstream IVSP aircraft, known in Swedish service as S102B Korpen, used for ELINT (Electronic Intelligence) purposes.

The aircraft, based on the American Gulfstream business jet but equipped with eavesdropping sensors, conduct surveillance missions in the Baltic Sea. According to Swedish Air Force officials, during those sorties, the Korpens fly in international airspace, with their transponders turned on, and regularly transmit their position to the relevant civilian air traffic control agency, both domestic and, if needed, foreign ones.

Nevertheless, as reported by the Swedish media outlet SvD Nyheter, the Swedish spyplanes are almost always intercepted by Russian armed fighter jets on Quick Reaction Alert at the Russian airbase in the Kaliningrad enclave.

Most of times such encounters are routine stuff, something that has happened in international airspace across the world, for several decades. However, Swedish officials who talked to SvD explained that the behaviour of the Russian Su-27 Flankers frequently scrambled to intercept the Gulfstreams has become increasingly aggressive.

The most dangerous incident occurred on Jul. 16, between Gotland and Latvia, when a Russian Su-27 Flanker, armed with 6 air-to-air missiles, intercepted one of the two Swedish ELINT jet, and flew as close as 10,7 meters of the spyplane.

Even if there was no real risk of collision, the incident highlighted a behavior that the Swedish military have not seen in previous years, SvD reported. In fact, international procedures recommend not flying closer than 50-150m from other planes during interceptions.

Actually, this is neither the first nor the last time a Russian Flanker performs a dangerous intercept on a foreign air arm’s surveillance plane.

On Apr. 10, 2012, a Royal Norwegian Air Force P-3 Orion flying over the Barents Sea came across a Russian Air Force Mig-31 Foxhound: the Norwegian crew initially observed the Mig-31 twice shadowing the P-3 at a safe distance, then disappearing. Moments later the Russian fighter jet came back from behind the patrol aircraft, so fast and close it was in danger of a mid-air collision.

On Apr. 23, 2014 a U.S. Air Force RC-135U Combat Sent performing a routine surveillance mission in international airspace over the Sea of Okhotsk, north of Japan, was intercepted by a Russian Su-27 Flanker which flew within 100 feet of the American aircraft.

On Jul. 18 (two days after the interception of the Swedish Gulfstream), an RC-135 Rivet Joint spyplane crossed the Swedish airspace, to escape interception by Russian fighter jets.

There are several other similar incidents that did not end with a collision; however, mid-air collisions occur every now and then.

On Sept. 13, 1987, a RNoAF P-3B collided mid-air with a Soviet Sukhoi Su-27 Flanker over the Barents Sea.

Although damaged, both planes were able to land safely, but all the episodes we have recalled, from the oldest to the most recent between the Russian Flanker and the Swedish Gulfstream show how dangerous close encounters can be.

H/T Erik Arnberg and Lasse Holmstrom for the heads-up

Image credit: Swedish Air Force via SvD