The DS30B is a marinised, stabilized gun mount, which accommodates the Oerlikon 30mm cannon. The DS30B arms the Huon-class coastal minehunters and is the only 30mm gun in service in the Australian Defence Force. The DS30B mounts on the Huons are of the LOCSIG type (locally controlled by a single operator).


Function Rapid fire cannon
Manufacturer MSI-Defence Systems
Rate of fire 650 rounds per minute
Calibre 30 millimetre
Barrel life 5,000 rounds (approximately)
  • Anti-surface: 10 kilometres
  • Anti-air 2.75 kilometres
Usage Minehunter, Coastal (MHC)


Anti-missile and close-in weapon system