The Royal Navy's version of the Global Combat Ship is referred to as the Type 26 frigate. This variant will be equipped with the Type 997 Artisan 3D search radar and Sea Ceptor (CAMM) air-defence missiles launched via 48 vertical launching system (VLS) canisters. Additional 24-cell Mark 41 "strike-length VLS" cells is positioned forward of the bridge which are capable of firing missiles such as the Tomahawk land-attack cruise missile, anti-submarine rockets, a future anti-ship missile, or quad-packed ESSMs. Like the Type 23 frigate it will replace, the Global Combat Ship will have an acoustically quiet hull for anti-submarine warfare and fitted with an Ultra Electronics Type 2150 next generation bow sonar and a powerful Sonar 2087 towed array. The Global Combat Ship will also be fitted with guns of various calibres. Instead of the RN's current 4.5 inch Mark 8 naval gun, the Global Combat Ship will be equipped with a NATO-standard BAE 5 inch, 62-calibre Mark 45 naval gun. Smaller guns include two Phalanx CIWS, two 30mm DS30M Mark 2 Automated Small Calibre Guns and a number of miniguns and general-purpose machine guns.