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HMNZS Otago (P148)#Upgrade currently says the vessel had her armament upgraded from a Bushmaster 25mm to a Rafael Typhoon 25mm. But the Rafael Typhoon article, and various references I found suggest the Typhoon is everything but the actual weapon - that is the sensors, ballistics computer, and the mechanical aiming components of the gun. Typhoon mounts can accommodate a variety of guns, including the Bushmaster.

I suggest that the upgrade did not replace the Bushmaster, just the sensors and ballistic computer supplied with it, with something superior. Geo Swan ( talk) 21:11, 17 August 2019 (UTC) reply