The Kongo Class is an improved version of the U.S. Navy’s Arleigh Burke class, displacing 9,485 tons (full load). The Aegis system's maximum detection distance, the number of simultaneously tracked targets, reaction time and missile range are superior in all points by comparison with the former Tartar system. The ASROC anti-submarine rocket, which is the anti-submarine weapon, along with the Standard anti-aircraft missile, are launched from the VLS (the vertical launch system) which is imbedded in the front and back section decks. The third unit of the class [Myoko] was the first with SM2MR Block III (the Block II was used on the first two ships). They are to receive New ASROC (presumedly ASROC with Japanese lightweight torpedo), and to be fitted with P/S(1)2 12.7mm or 20mm with night vision equipment.