# Bridge Calc: Draft & Ballast — Maritime tools for officers

> Maritime tools for officers (iPhone/iPad app by Stanislav Soroka.)

- Source: https://appshunter.io/ios/app/bridge-calc-draft-and-ballast/id6745449412 (this page in markdown: same URL + `.md`)
- Developer: [Stanislav Soroka](https://appshunter.io/developer/1701402639)
- Category: Education
- Price: $24.99
- Age rating: 4+
- Requires: iOS 14.0 · 37 MB
- Languages: English
- Released: 2025-06-16
- Data updated: 2026-08-10
- User reviews in markdown: https://appshunter.io/ios/app/bridge-calc-draft-and-ballast/id6745449412/reviews.md

## What is Bridge Calc?

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


## Version history (last 2 releases)

### 1.0.1 — 2025-09-23

Ver. 1.0.1
1. Updated contact details for better communication
2. Improved in-app message submission form for faster and easier support
Stay tuned for more improvements!

### 1.0 — 2025-06-16

No release notes.

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## More apps by Stanislav Soroka

- [Marine Survey Pro](https://appshunter.io/ios/app/marine-survey-pro/id6458737068)
- [Marine Survey Assistant](https://appshunter.io/ios/app/marine-survey-assistant/id6475769290)
- [Українці в Греції](https://appshunter.io/ios/app/id6503212247)
- [Engine Calc: Fuel & Slip](https://appshunter.io/ios/app/engine-calc-fuel-and-slip/id6745450059)
- [ETA Calculator](https://appshunter.io/ios/app/eta-calculator/id6747178906)

All apps by Stanislav Soroka: https://appshunter.io/developer/1701402639

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-10.*