OAKLAND, Calif. & FLENSBURG, Germany–(BUSINESS WIRE)–Navis, the leading provider of maritime software solutions for efficient and compliant cargo, stowage planning and vessel performance, announced that the MACS3 loading computer has successfully complied with the International Maritime Dangerous Goods (IMDG) code amendment 40-20. The MACS3 loading computer is setting the industry standard in maximizing operational safety for container vessels as well as efficient loading operations worldwide