Bridge Calc: Draft & Ballast

Marine tools Offline: Draft Survey, Ballast, Triming, Stowage Plan and more

Bridge Calculators is an offline tool designed for maritime professionals. It includes a set of calculators commonly used by deck officers, chief mates, and shipmasters for cargo handling, draft management, stability assessment, and onboard calculations.

Available modules:

• Draft Survey Calculator. Manual and automatic calculation of loaded or discharged cargo based on draft readings and vessel data.

• Ballast Calculator Calculates ballast water quantity in tanks (manual or automatic). Allows vessel, tank, and tank table setup. Provides fast results based on tank geometry and soundings.

• Stowage Plan Calculator Automatic cargo distribution by holds using cargo stowage factor. Includes port entry/exit remarks for arrival and departure planning.

• Cargo Trimming Calculator Final trimming calculator at the end of loading. Calculates cargo quantity required to reach even keel or target trim.

• Unit Converter Converts various maritime units including stowage factor, volume, length, speed, and temperature.

• List Calculator Calculates vessel heel (list) in degrees for navigational assessment.

• Humidity Calculator Calculates relative humidity based on temperature and dew point.

• Squat & UKC Calculator Assesses under keel clearance (UKC) and squat effect based on speed and draft.

• Draft & GM Change Calculator Calculates changes in draft and metacentric height (GM) when transitioning between waters of different density.

Additional features:

• Offline operation – all calculators work without internet access.
• Google Drive backup for Draft Survey and Ballast Calculator, allowing secure data storage and recovery on another device.
• Light and dark themes for comfortable use in various working conditions.
• Clean and practical user interface optimized for onboard use.

The application is designed to assist with real-world vessel operations and enhance efficiency during cargo and stability-related tasks. Suitable for commercial vessels of all types