The Kongsberg cNODE® Maxi and Mini is a new family of transponders for underwater acoustic positioning and data link. The cNODE® design is very modular and covers a large range of applications with its variety of different transducers, internal and external sensors, housing materials and other add-on functions and can all be positioned by HiPAP® underwater positioning systems. The floating collar and release design make the launch/recovery operation safe and easy.