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Trimming Calculation Tool for Large Cargo Amounts

Updated: Nov 24


Trimming Calculation Tool interface for bulk carrier, showing draft readings and cargo adjustments.

The Trimming Calculation Tool is specially designed for calculating ship trim with larger cargo amounts 🌊. This tool provides detailed, step-by-step guidance to achieve accurate trim calculations when managing significant cargo loads ⚖️.

How to Use the Trimming Calculation Tool

Step 1: Prepare Ship Data 💾

Navigate to the Ship's Data page to fill and save essential data. This data is critical for accurate trimming calculations, so ensure it is entered correctly ✅.

Step 2: Input Draft Readings 📝

Enter the 6 Draft Readings. These readings will determine the Midship Draft, which is used to match hydrostatic data 📊.

Step 3: Enter Hydrostatic Data 📈

The hydrostatic calculation process is divided into three steps to ensure accurate displacement and trim values:

Step 1: Calculate LCF from Middle Perpendicular

  • Enter the LCF (Longitudinal Center of Flotation) based on the Midship Draft.

  • If the LCF is provided from the aft perpendicular, use the LCF Converter to find the value from the middle perpendicular 🔄.

  • Enter the LCF data above and below the required draft for accuracy.

Step 2: Determine Ship Displacement

  • Input the Displacement for the actual dock water density.

  • Use the Density Converter if you need to adjust displacement values 🌊.

  • As with LCF, displacement data should be entered above and below the required draft.

Step 3: Final Hydrostatic Data

Hydrostatic data can be entered in two ways for flexibility:

  1. Manual Entry: Input the Final Ship Displacement, Draft for this Displacement, LCF from Middle Perpendicular, and MTC (Moment to Change Trim) for the actual dock water density manually.

  2. Insert Data from Hydrostatic Tables: If the hydrostatic data has already been saved in the Hydrostatic Tables section of the Ship's Data page, click Insert Data to automatically populate the required values 🔄.

Use the Density Converter again if needed to adjust values to the required density 🔧.

Step 4: Input Cargo Hold Data for Trimming ⚓

After completing the hydrostatic data, enter details for the two cargo holds used in trimming adjustments:

  • Number of Holds: Specify which holds you’ll be loading or discharging.

  • Weight for Each Hold: Use positive values for loading cargo and negative values for discharging cargo.

  • LCG of Each Hold: Enter the Longitudinal Center of Gravity for each hold relative to the middle perpendicular.

    • If the ship’s data provides LCG from the aft perpendicular, use the LCG Converter to calculate the value from the middle perpendicular.

The tool will calculate the Final Forward and Aft Drafts based on the cargo weight and hold positions 📊.

Final Steps: Save Additional Details 💾

In the last section, enter the following details:

  • Port Name

  • Date 📅

  • Remarks (optional)

Record Book 📖

At the top of the page, click the Record Book icon to save additional notes or records related to your trimming calculations. This feature is perfect for future reference 📝.

Print the Trimming Calculation Report 🖨️

After completing all calculations:

  1. Click the Print button at the bottom of the page to open the Print Out Form.

  2. In the top-right corner, use the Print Icon to print the report directly or save it as a PDF 📄.

Important Notes ⚠️

Always click all available Calculate and Save buttons to ensure that all data is updated and saved correctly ✅.

Need Help? 💬

If you have any questions or need clarification on using the Trimming Calculation Tool, leave a comment below! Our Admin team is always ready to assist 😊.


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