After saving the Maxsurf design file for the first time in Hydromax, a “Hydromax Design file” (.hmd) is created. The Hydromax design file will consist of the hydrostatic sections and all input data such as compartment definitions, key points, sounding pipes etc. Hydromax also allows saving of all input and output files into individual files.

To open an existing design, there are two options:

Ø  Double click on the .hmd file from any Windows explorer window

Ø  Use the Hydromax Open command form the file menu and select the .msd file

An existing Hydromax design consists of a number of files with different file extensions.

When Hydromax opens a .msd file, it will look for a .hmd file with the same name as the .msd file. For example: when opening OSV.msd, the OSV.hmd file is found. The Calculate Sections dialog now has the option to read the sections from the file.

Ø  Ensure “Read existing data and sections” is selected and click OK.

Hydromax will now open the .hmd file. This contains hydrostatic sections information and all input information from last time the .hmd file was saved, i.e. compartment definitions, loadcases, damage cases, key points etc.

Notes:

1) When selecting “Read existing data and sections (do not update geometry)” the Maxsurf surface information is not recalculated. This means that changes to the hull shape in the Maxsurf Design file, are not automatically incorporated. You will load your existing sections, loadcases and compartment definitions etcetera. See: Updating the Hydromax Model on page 25 for more information.

2) Calculate new sections (ignore existing data, if any) means that Hydromax will recalculate the hull sections and ignore any data stored in the .hmd file. You will have to reload your individual loadcases and compartment definition files etcetera after you have selected this option and pressed OK. For more information on file properties and extensions in Hydromax, please see: File Extension Reference Table on page 242.