The P-800 Oniks (; ), marketed in export as the Yakhont (; ), is a Soviet/Russian supersonic anti-ship cruise missile developed by NPO Mashinostroyeniya as a ramjet version of the P-80 Zubr. Its GRAU designation is 3M55, the air launched Kh-61 variant was planned but never built. The missile has the NATO codename SS-N-26 "". Development commenced in 1983, and in the 1990s the anti-ship missile was tested on the Project 1234.7 ship. In 2002 the missile passed the whole range of trials and was commissioned. It is reportedly a replacement for the P-270 Moskit, and possibly also of the P-700 Granit.
In 2010 Sergei Prikhodko, senior adviser to the Russian President, has said that Russia intends to deliver P-800 to Syria based on the contracts signed in 2007. Syria received two Bastion missile systems with 36 missiles each (72 in total). The missiles' test was broadcast by Syrian state TV.
In May 2013, Russia continued the contract delivery to the Syrian government supplying missiles with an advanced radar to make them more effective to counter any future foreign military invasion. A warehouse containing the Bastion missiles was destroyed by an Israeli air strike on Latakia on 5 July 2013, but US intelligence analysts believe that some missiles had been removed before the attack.
Oniks missiles were reportedly used in 2016 against ISIL targets.
The P-800 was used in the Russo-Ukrainian War. The Russian Defense Ministry announced that it had used the missile in 1 May 2022; reportedly a number of Oniks missiles were used to destroy military equipment around the city of Odesa. On 9 May 2022 Russian missile forces in Crimea, launched 4 Onyx missiles on Odesa. Russian MOD reported that their forces attacked Ukrainian helicopters located in Artsyz in the Odessa region. One Ukrainian Mi-24 helicopter was destroyed in the ground and one person was killed.
Ukrainian Air Force Spokesperson Yurii Ihnat mentioned that the flight profile of the missile is of particular concern: "Onyx missiles are designed to destroy watercraft, and ships, it flies at a speed of 3000 km per hour, that is, very fast,... On the march [cruising], it can rise high, and when entering the target, it can actually fly 10âÂÂ15 meters above the water to destroy the ship." He concluded that it was "impossible" to shoot them down with available anti-air means, but he mentioned that some success was found when using electronic warfare against them; he mentioned that a missile attack on 23 September 2023 missed a military target and destroyed a "recreational area", adding that "something affected its flight."
Russian sources reported on 27 March 2024 that the missile received a new active homing head in order to hit ground targets more precisely.
On 20 August 2024, at the Congress of Local and Regional Authorities, Commander-in-Chief of the Armed Forces of Ukraine Oleksandr Syrskyi for the first time announced data on how many weapons Russia has used since 2022, as well as how many were intercepted. The report said that only 12/211 (5.69%) of Onyx were intercepted by Ukraine's air defense
Radar homing head
Standard batteries of the K-300 Bastion-P (ÃÂðÃÂÃÂøþý-ÃÂ-ÃÂþôòøöýÃÂù):