The NAVIKNOT Multi-sensor Speed Log series comprises a uniquely flexible range of speed log systems, for use on many types of vessels, such as cruise ships, container ships, tankers, superyachts and a wide variety of other craft. Northrop Grumman Sperry Marine has a long and successful history of providing high-accuracy speed logs, and is unique in using both Doppler and electromagnetic sensors, as well as satellite technology. This experience and capability guarantees you the performance you require, whether in new-build or for upgrades or retrofits, complementing the existing technology in use.

Sperry Marine have designed the NAVIKNOT series to provide effective progression from earlier products, to maximise your convenience while enabling you to adopt the latest speed log functionality, whether for new build or retrofit. You can easily upgrade or retrofit existing systems. The NAVIKNOT 350E employs electromagnetic sensors while the NAVIKNOT 450D uses Doppler sensors. The NAVIKNOT 600 series all employ satellite sensors, with the NAVIKNOT 600SE also featuring an electromagnetic sensor, and the 600SD using a Doppler transducer, so allowing complete flexibility of choice.

All the systems in the NAVIKNOT Speed Log series are type-approved by Germanischer Lloyd to MED 96/98/EC.