The input of the SHIPMA model is organised through the Graphical User Interface. The Shipma GUI organises all data for a project in a hierarchical tree. A Shipma project tree consists of a number of subordinate “nodes”, each defining some aspect of the project:
- A set of nodes containing a description of the manoeuvre, desired track, setting of autopilot, time step, starting position, tugs etc.
- A set of nodes in which the ship is represented by dimensions, mass, windage area, etc. and the manoeuvring characteristics of the ship, to be expressed in hydrodynamic derivatives
- Nodes to describe several external conditions such as bottom level, current pattern, wind field, wave field.
Note that for this type of data Shipma offers the possibility of choosing for a simple set-up with constant wind, waves or current or to import self prepared environmental grids in which the number of grid points is practically unlimited.
The main output consists of:
- track, position, course and heading of the ship
- course deviation and distance to the desired track
- rudder angle and number of propeller revolutions
- for wind and waves: direction, velocity/height and forces acting, on the ship
- water depth at the centre of gravity
- current velocities on the ship
- bank suction forces
- tug forces
The track and the output data can be plotted using D3D-Quickplot.