New IHO-S52 Edition 6.1.0 and/or IEC standard 61174 Edition 4.0 for ECDIS had been extended to August 2017 (Original date August 2016). Uncategorized Newer Post Upload Alphatron Marine new product namely Gate Valve type transducer for JRC JLN-550 doppler sonar. Older Post Navitron Systems Ltd provide new products’ update namely NT1000EPR digital inclinometer & NT850 Main Steering System.