# NCB Tool

> Maritime surveying calculation tools for GM, FWA, stowage, and more. (iPhone/iPad app by National Cargo Bureau, INC.)

- Source: https://appshunter.io/ios/app/ncb-tool/id1191688359 (this page in markdown: same URL + `.md`)
- Developer: [National Cargo Bureau, INC](https://appshunter.io/developer/1191688358)
- Category: Utilities, Reference
- Price: Free
- Rating: 1.50/5 from 2 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 8.0 · 28 MB
- Languages: English
- Released: 2017-03-13
- Data updated: 2026-07-04
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/ncb-tool/id1191688359/reviews.md

## What is NCB Tool?

A Set of Useful Calculation Tools for Maritime Surveying.  Find accurate calculations for 
rolling periods (GM)
Single and double interpolation
Fresh water allowance (FWA)
Vessel Stowage factors
Temperature Conversions
Time and Distance by vessel 
Trigonometric Functions
and local time calculations

## Key features

- Rolling periods (GM) calculation
- Single and double interpolation
- Fresh water allowance (FWA)
- Vessel stowage factors
- Temperature conversions
- Time and distance calculations
- Trigonometric functions

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/ncb-tool/id1191688359/reviews.md

### 2/5 — Interpolator issue

*2017-10-23*

The Interpolator doesn’t allow a zero value to be entered into the x or y axis. Also negative values can’t be interpolated. For increased accuracy, 3 decimal places should be allowed. Once these issues are addressed, you will have an extremely handy app for navigating through ballast and cargo tank capacity tables!

## Frequently asked questions about NCB Tool

### What calculations does NCB Tool offer?

NCB Tool offers calculations for rolling periods (GM), single and double interpolation, fresh water allowance (FWA), vessel stowage factors, temperature conversions, time and distance, trigonometric functions, and local time.

### Is NCB Tool free to use?

Yes, NCB Tool is available for free, with no cost to download or use its features.

### What devices support NCB Tool?

NCB Tool is supported on iPhone, iPad, and iPod devices.

### When was NCB Tool last updated?

NCB Tool was last updated on March 13, 2017, with version 1.0.

### What is the age rating for NCB Tool?

NCB Tool has an age rating of 4+, making it suitable for a wide range of users.

### Does NCB Tool have ads?

No, NCB Tool does not contain advertisements.

### What is the user feedback on NCB Tool?

NCB Tool has a rating of 1.5 stars based on 2 ratings, indicating a mixed to negative user reception.

## Version history (last 1 release)

### 1.0 — 2017-03-13

This app has been updated by Apple to display the Apple Watch app icon.

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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 2026-07-04.*