The British Royal Navy's Trafalgar -class nuclear-powered attack submarine HMS Torbay returned to service this past April following an extensive year-long modernization. Improvements to the submarine, which displaces 5,200-tons (submerged), include a modernized type 2076 sonar system and the capability to launch Block IV Tomahawk land-attack cruise missiles. The missile, commonly referred to as the Tactical Tomahawk, represents a significant improvement over previous versions. In addition to boasting increased range, this newest variant contains a two-way satellite data-link system that enables dynamic in-flight retargeting and allows the missile to loiter above a hostile region. When a target of opportunity presents itself, the missile can then quickly be reprogrammed to engage. HMS Torbay is expected to undergo sea trials throughout early summer before returning to full service later this year. At least three additional units of the Trafalgar -class are due to receive similar upgrades in the next few years.
