The MACS3 Loading Computer System is a computer controlled loading system for commercial vessels, developed by Navis. Prior to October, 2017 it was offered by Interschalt maritime systems GmbH, before by Seacos Computersysteme & Software GmbH. MACS3 consists of computer hardware and a range of software, which aim to minimize the operational load while loading a vessel, and to prevent any hard limitations from being breached. Design principles The software architecture and user interface of the MACS3 Loading Computer System are designed according to the standard ISO 16155:2006 Ships and marine technology - Computer applications - Shipboard loading instruments, and to the following Rules and Recommendations: DNVGL Class Guideline DNVGL-CG-0053 : Approval and certification of the software of loading computer systems ABS Guidance Notes for the Application of Ergonomics to Marine Systems BV Rules for the Classification of Steel Ships, Pt C, Ch 3, Sec 3 "COMPUTER BASED SYSTEMS" IACS Recommendation on Loading Instruments (No 48) Software structure The software of MACS3 Loading Computer System includes the MACS3 Basic Loading Program, performing functions of Categories A and B according to the ISO 16155:2006 and (optionally) a range of additional modules and programs, performing functions of Category C: PolarCode Basic Module BELCO Container Management Module DAGO Dangerous Goods Modules StowMan Stowage Planning SEALASH Lashing Module MIXCARGO General Cargo Module RoRo Module Crane Operation Module Bulk Carrier Modules Tanker Modules BallastMAN Ballast Water Exchange Module Voyage History DastyMAN Damage Stability Online Program (Tanks Online) The system runs under Windows 10 Professional 64Bit. Programs and Features MACS3 Basic Loading Program MACS3 Basic Loading Program is designed for all vessel types (containership, tanker, Bulk carrier, general cargo, RoRo, Passenger ship) in accordance with the unified IACS Requirement L5 "Onboard Computers for Stability Calculations". It is approved by all leading classification societies: LR, ABS, DNVGL, BV, ClassNK, KR, CCS. MACS3 Basic Loading Program performs: Ship stability and strength calculations, covering all pertinent international regulations like e.g. IMO A.749 Numerical and graphical results for metacentric height GM , trim, heel, draft, shear forces, bending moments and torsion Metacentric height GM check against various approved GM requirement curves GZ curve for dynamic stability Automatic wind pressure calculation Automatic ballast tank optimization Tank plan with visual editing Optional online measurement of tank levels and draft (sold separately) User interface with tabbed main window for multiple views, all fully customizable Screen and print reports in PDF, HTML and XML