Delta III were Soviet nuclear-powered submarines carrying ballistic missiles (SSBNs), which were probably built in 1975-1985 at the shipyard in the city of Severodvinsk. It is estimated that fourteen units of this class were built. The length of the Delta III-class ship was 155 m, width 12 m, and the underwater displacement reached 13,250 tons. The maximum underwater speed is approx. 24-25 knots. The main armament of units of this class consisted of 16 SS-N-18 (R-29R) ballistic missile launchers and 6 533 mm torpedo tubes.
The ships of the Delta III class (project 667 BDR) were constructed as a development of the Delta I and Delta II ships. Compared to their predecessors, they were significantly longer and could fire other, much more modern, ballistic missiles with greater firepower (SS-N-18), which were the first MIRV missiles in the Soviet Navy, i.e. missiles with several nuclear warheads that could be was to target various surface targets. Delta III-class units could also fire their missiles in any configuration and number. They also received a combat management system much more modern than their predecessors. Most likely, at present, four to six units of this type remain in the service of the Russian Navy.
The USS Ingersoll (DD-990) was an American missile destroyer, the keel of which was laid in 1977, launched in March 1979, and commissioned by the US Navy in 1980. The total length of the ship was 172 meters and a width of 16.8 meters. Full displacement reached approx. 8,000 tons, and maximum speed - up to 32-33 knots. The destroyer was armed with: two 127 mm Mark 45 cannons, two 20 mm Vulcan Phalanx sets, a single 8-rail ASROC missile launcher or a single 8-rail Sea Sparrow rocket launcher. The ship could also operate two SH-60 Seahawk (LAMPS III) helicopters. USS Ingersoll (DD-990) was one of 31 Spruance-class ships. Ships of this type were designed and built as specialized ZOP (anti-submarine) units dedicated to the protection of aircraft carriers and being part of larger US Navy teams. They replaced the class destroyers Gearing and Allen M. Summer. Units of this class were built modularly, which facilitated their modernization during the service. One of the ships of this class was the USS Ingersoll. The vessel was built at Ingalls Shipbuilding in Pascagoula, Mississippi. Shortly after entering service, she was assigned to the Pacific Fleet. Already in 1985, the ship underwent modernization and was subjected to renovation works, as a result of which, among others, it received the Tomahawk ABL missile launcher. Seven years later (1992), the USS Ingersoll collided with an Iranian oil tanker in the Strait of Malacca and was diverted first to Singapore and then to Pearl Harbor for repair. The ship was decommissioned in 1998 and sank as a target ship in 2003.