How does it work?
GLM calculates the buoyancy and the weights involved using the
given loads, finding drafts and tank levels. It bases its calculations
on a detailed model of the ship and its tanks -- in conjunction with
light ship weight distribution if longitudinal strength is being
The stability assessment can take many forms, depending on the
requirements of the particular vessel:
- Comparing the present VCG with precomputed curves of Maximum VCG, and
displaying the Stability Margin (see the graphic below).
- Calculating the righting-arm curve with the present loading, and
analyzing the curve according to an applicable stability standard.
- Checking the present load condition with respect to more than one
stability standard, perhaps depending to a particular service mode.
- Including a damage stability assessment for assumed damage at various
locations on the vessel.
- Performing damage stability calculations with a given flooding
condition for damage control.
Depending on the type of the vessel and its needs, there are many auxiliary
features that are available to the naval architect who configures the GLM for
the particular vessel. Buttons around the periphery of the GLM window give
access to such features.
Creative Systems, Inc.