How to get a GLM ... starting with nothing - Basic Configuration Instructions

First, we need a computerized model of your vessel. If it was designed after about 1975 or you have had an inclining recently, chances are good that some kind of computer model already exists. Check with the designer or the naval architect who did the inclining. If you are unable to locate a computer model, the next best thing is to locate the lines and general arrangement drawings. Any naval architect can create the computer model from these drawings. If there is no computer model and no drawings it comes down to having to take measurements off of the hull and interior bulkheads. There are services which do this using laser equipment that produce accurate computer models directly.

Second, you need a Trim and Stability book showing the current light-ship weight and center of gravity. If this is not available (if your vessel is not required by law to have one) the light ship weight and CG can be derived by doing an inclining experiment. Normally a naval architect would do this. However it is possible to do essentially the same thing using the GLM directly if you have port and starboard tanks large enough to induce a few degrees of heel and you have an accurate way of measuring the heel angle.

The first person to contact about getting GLM for your vessel is the naval architect who made the trim and stability book. If that is impossible or impractical for any reason, another naval architect in your area should be able help you out. If there is no such person or if you cannot find one familiar with GLM, you can contact Creative Systems , the GLM software manufacturer.

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