MasterLoad™ – a specialized software package, developed by API Marine provides on-board calculation of cargo conditions and stability of the ship.


MasterLoad™ – Cargo Computer/Strength Monitoring System

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MasterLoad™ – is a software package for calculation of load, stability, strength, floatability for tankers, gas carriers, dry bulk cargo ships, container carriers, sea-river vessels, general cargo vessels, floating drilling platforms, floating dry docks, floating cranes and other types of floating structures.

MasterLoad™ allows to:

  • Create loading and ballasting plan of the vessel in on-line mode and save it in the Database
  • Develop a ballasting scheme for the vessel (floating platform), based on specified draft
  • Calculate trim/heel, stability and strength of undamaged vessel in the current load status
  • Create a virtual model of emergency situation and calculate trim and stability when specified compartments are flooded
  • Calculate dock operations (arrangement of ships in the dock, ballasting and strength calculation)
  • Arrange integration of separate modules of the floating object with calculation of trim-stability at each step of enlargement

MasterLoad™ is certified by international classification societies as an onboard strength monitoring device. It has a simple user-friendly interface, allows data input to the calculation program directly from sensors installed in cargo, ballast or service tanks (on-line mode), which ensures accuracy of trim, stability, strength calculations. Off-line mode allows compiling preliminary loading and ballasting scheme and automatically generating output documents “for sailing/for arrival”.

Information on ship’s load condition can be transferred through mobile networks (satellite/cellular) to the shore center or ship-owner.

The program has interface for communication with the Emergency Response Centre for immediate information transmission about emergency situations.

Modules for Different Types of Ships


  • On-line communication with sensors in cargo tanks
  • Automatic calculation of the amount of loaded/unloaded cargo
  • Drafts correction

LNG and LPG Carriers:

  • On-line communication with sensors in cargo tanks
  • Calculation of free surface influence during cargo evaporation
  • Calculation of acceleration from displacement of cargo masses

Bulk Carriers:

  • Special transportation features for bulk cargo (SF-factor)
  • Drafts correction
  • On-line communication with level sensors in ballast and service tanks

Sea-river vessels:

  • Cargo plan for different types of cargo
  • Calculation of trim for passage under bridges
  • SQUAT effect calculation

Container Ships:

  • Automatic distribution of containers
  • Sorting by loading/unloading ports
  • Windage calculation adjusted for deck containers

General Cargo Vessels:

  • Cargo arrangement in hold in on-line mode
  • Shallow-water effect calculation
  • Special transportation features for timber cargo

Floating Cranes:

  • Precalculation of suspended cargo effect
  • Calculation of heel, trim and stability

Offshore Floating Drilling Platforms:

  • Stability calculation in transition modes
  • Trim calculation in emergency modes
  • Automation of ballasting operations


All oil tankers constructed before 1 January 2016 shall comply at the fist scheduled renewal survey of the ship after 1 January 2016, but not later than 1. January 2021

To meet requirements there are there are two global options:

  1. To install new loading SW or update existing.
  2. To request Class Administration to waive the requirements ( listed in new Regulation 3.6).

API Marine offers:

  •          new Loading Software – MasterLoad
  •          upgrade existing Loading Software
  •          consultancy and contacts to Class