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Modified computation method for ullage & sounding under heel or trim

Posted on October 4, 2017

PIAS’ Layout module is able to produce tank sounding tables with a variety of parameters and units. Commonly, if the ullage or sounding parameters are included in such a table, those are determined in a user-defined sounding pipe, which can exist of two or more points. The latter to model curved or knuckled pipes. Additional, it is also possible to define just a single point, which is then used as the reference point for ullage or sounding. Conventionally, for such a case the ullage or sounding was computed under the assumption that the measuring tape goes through this reference point in a vertical direction. On September 22, 2017, this mechanism has been changed, and now a direction perpendicular to the water plane (so, including the effect of heel and trim) is applied, which is more realistic.

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