1) Yes, it’s nicknamed “Gertrude”. 2) Yes, every tactical platform that hunts subs has an active sonar capability of some kind. (Hull mounted, towed, dipping,

1) Yes, it’s nicknamed “Gertrude”. 2) Yes, every tactical platform that hunts subs has an active sonar capability of some kind. (Hull mounted, towed, dipping, sonobuoys, ...) When the ambient noise floor exceeds the target sub’s noise, you need that option.