Menu bar/Tools/Tank Calibration
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Purpose:
Automatically calibrates current ship’s tanks and creates for each tank:
- Tank location / presentation plan.
- Tank calibration diagram showing volume, weight, LCG, VCG, VCGt, FS area and FSM curves according to sounding / ullage.
- Tank calibration table displaying volume, weight, LCG, TCG, VCG, VCGt, FS area and FSM.
- Tank Pipe Data table (if current tank contains a sounding pipe) displaying tank and pipe’s sounding / ullages, volumes, weights, and corresponding pipe coordinates.
It is recalled that when tanks contain a sounding pipe (i.e. an affiliated line in the ‘Sounding Pipe Layer’ declared on [Ship] tab's [Hydro] page), the reports automatically include the corresponding sounding pipe data and the ‘Sounding Tables’ function detailed below becomes usable (see FAQ for more details).
Inputs:
The following dialog box pops up when the function is selected:
The ‘Step’ input field allows entering the free surface increment, provided that heel and trim are fixed to 0°. .
The ‘F.S. Incrementation’ selector allows selecting whether table’s tank fillings are displayed from 0% to 100% or from 100% to 0%.
The input field located in the ‘Document Name’ frame allows naming the 2D folder in which the reports will be created.
Finally, when the input data are set:
The [OK] button can be clicked for starting the tank calibration.
The [Help] button allows displaying the online help (Internet access necessary).
The [Cancel] button allows cancelling the calculation.
Outputs:
After clicking on the [OK] button, a 2D folder is created in the [2D] tab, containing a 'General' tanks presentation folder and an individual folder per tank, containing its calibration reports:
1: General Tank Presentation:
For further details on controlling the tank presentation report's layout, see the corresponding FAQ item.
When a 'Capacity Layout' has been also defined on [Ship] tab's [Capacity Layout] page (see FAQ item), a user-defined tank presentation plan is automatically added:
2: Tank Location / Presentation Plan (for each tank)
3: Tank Calibration Diagram (for each tank):
4: Tank Calibration Table (for each tank):
5: Tank Pipe Data Table (for each tank):
Limitations:
- For obvious reasons, this function only operates when tanks are included in ship’s model.
- Tank pipes must be affiliated to the tanks if you want to calculate the tank pipe data.
- Tank’s permeability and density must be set to realistic values.
Typical use:
Calibrating ship’s tanks for designer’s purpose (use ‘/Tools/Sounding Tables’ for getting ship tank’s onboard data).
Example:
Open the ‘Example Ship.m2a’ file and double click on ‘Damage 100% Supply’ in the 3D browser to select this virtual ship:
- Select "/Curve/Line/Line" in the menu bar.
- Type '12.9,0.1,0.1[Return]' to input tank pipe's bottom.
- Type '12.9,0.1,1.2[Return]' to input tank pipe's top.
- Check the 'Tank Pipe Layer' on [Ship] tab's [ Hydro] page.
- Click on the [Data] tab to display the corresponding page.
- Rename the created line 'GO PS Tank Pipe' in the 3D browser
- Set 'GO PS Tank Pipe' line's layer to the current 'Tank Pipe Layer'.
- Drag the 'GO PS Tank Pipe' line with the 3D browser to drop it in the 'GO PS' tank.
- Select '/Tools/Tank Calibration' and validate directly.
- Compare the results obtained with and without affiliating a tank pipe.
- Compare these results with the 'Sounding Tables' results.