Block V is latest variant of tactical land attack cruise missile used by UK and US navies. The USN has ordered 90 full-rate production Lot 17 Block V Tactical Tomahawk (TACTOM) All Up Round (AUR) Vertical Launch System missiles from Raytheon under a $145.1 million contract modification. Raytheon will also provide TACTOM AUR recertification AGR-4 spares. Work will be performed primarily in the US with some tasks carried out in Canada and the UK, for completion by December 2023. The Tomahawk is a tactical land attack cruise missile that can be fired from surface platforms or submarines and aircraft. It is primarily used by the USN and the UK Royal Navy.