# Nautical Calculator — for Marine Navigation

> Marine navigation calculator with celestial, distance, and conversion tools. (iPhone/iPad app by Aviation Mobile Apps, LLC..)

- Source: https://appshunter.io/ios/app/nautical-calculator/id1221203637 (this page in markdown: same URL + `.md`)
- Developer: [Aviation Mobile Apps, LLC.](https://appshunter.io/developer/286046308)
- Category: Navigation
- Price: $8.99
- Rating: 5.00/5 from 4 App Store ratings
- Age rating: 4+
- Requires: iOS 9.1 · 11 MB
- Languages: American English
- Released: 2017-12-01
- Data updated: 2026-08-25
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/nautical-calculator/id1221203637/reviews.md

## What is Nautical Calculator?

Nautical Calculator is an easy to use app to help solve the equations and conversions typically associated with marine navigation and includes celestial calculators, conversions calculators, distance calculators, logarithm and trigonometry calculators, and sailings calculators.

This app is the finest nautical calculator you will find for the Apple iPhone, iPad, and iPod Touch and includes the computations, tables, and full text of the "The American Practical Navigator" by Nathaniel Bowditch.

With more than 35 nautical calculations, unit conversions and reference material, we are sure you will find this app convenient in solving the planning and navigating problems associated with marine navigation.

Calculations Include:

Celestial Navigation Calculators
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1. Compass Error from Amplitudes Observed on the Visible Horizon
2. Altitude Correction for Air Temperature
3. Table of Offsets
4. Latitude and Longitude Factors
5. Altitude Correction for Atmospheric Pressure
6. Altitude Factors & Change of Altitude
7. Pub 229
8. Compass Error from Amplitudes Observed on the Celestial Horizon
9. Meridian Angle and Altitude of a Body on the Prime Vertical Circle


Conversions Calculators
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1. Chart Scales and Conversion for Nautical and Statute Miles
2. Conversion for Meters, Feet and Fathoms


Distance Calculators
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1.  Length of a Degree of Latitude and Longitude
2.  Speed for Measured Mile and Speed, Time, and Distance
3.  Distance of an Object by Two Bearings
4.  Distance of the Horizon
5.  Distance by Vertical Angle Measured Between Sea Horizon and Top of Object Beyond Sea Horizon
6.  Traverse Table
7.  Geographic Range
8.  Distance by Vertical Angle Measured Between Waterline at Object and Top of Object
9.  Dip of Sea Short of the Horizon
10. Distance by Vertical Angle Measured Between Waterline at Object and Sea Horizon Beyond Object
11. Meridional Parts


Log and Trig Calculators
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1. Log10
2. tangent
3. cosecant
4. sine
5. cotangent
6. cosine
7. secant

Sailings Calculators
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1. Great Circle Sailing
2. Mercator Sailing


Time Zones Calculators
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1. Time Zones
2. Zone Descriptions, and Suffixes


Weather Data Calculators
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1. Direction and Speed of True Wind
2. Correction of Barometer Reading for Height Above Sea Level
3. Correction of Barometer Reading for Gravity
4. Temperature Conversions
5. Relative Humidity and Dew Point
6. Correction of Barometer Reading for Temperature
7. Barometer Measurement Conversions


Included Reference Documents
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1. AMERICAN PRACTICAL NAVIGATOR - VOL 1
2. AMERICAN PRACTICAL NAVIGATOR - VOL 2
3. SIGHT REDUCTION TABLES VOL 1 0° - 15°
4. SIGHT REDUCTION TABLES VOL 2 15° - 30°
5. SIGHT REDUCTION TABLES VOL 3 30° - 45°
6. SIGHT REDUCTION TABLES VOL 4 45°- 60°
7. SIGHT REDUCTION TABLES VOL 5 60°- 75°
8. SIGHT REDUCTION TABLES VOL 6 75°- 90°


Learn more at http://www.NauticalCalculator.com

## Key features

- Celestial Navigation Calculators
- Conversions Calculators
- Distance Calculators
- Log and Trig Calculators
- Sailings Calculators
- Weather Data Calculators
- Reference Documents

## Chart rankings

- #116 in Top Paid · Navigation (US App Store)


## Frequently asked questions about Nautical Calculator

### What calculations does Nautical Calculator offer?

Nautical Calculator includes over 35 calculations covering celestial navigation, distance, unit conversions, trigonometry, sailings, and weather data. It also provides reference documents like "The American Practical Navigator."

### Is Nautical Calculator available on Android?

Nautical Calculator is currently available for iPhone, iPad, and iPod Touch. It is not listed as being supported on Android devices.

### How much does Nautical Calculator cost?

Nautical Calculator is a paid application priced at $8.99. There are no in-app purchases or subscriptions mentioned.

### Does Nautical Calculator have ads?

No, Nautical Calculator does not contain advertisements. It is a paid app designed to be ad-free for a better user experience.

### What is the age rating for Nautical Calculator?

Nautical Calculator has an age rating of 4+, making it suitable for a wide range of users interested in marine navigation.

### How often is Nautical Calculator updated?

The latest version of Nautical Calculator is 1.1, which was last updated on August 16, 2018. Information on update frequency beyond this is not provided.

### What is the user sentiment for Nautical Calculator?

Nautical Calculator has received a perfect rating of 5.0 stars from 4 ratings, indicating a very positive user sentiment among its current users.

### Can Nautical Calculator be used offline?

The description does not explicitly state whether Nautical Calculator requires an internet connection for its calculations. However, many navigation tools are designed for offline use.

## Version history (last 2 releases)

### 1.1 — 2018-08-16

This update from Apple will improve the functionality of this app. No new features are included.

Bug fix.  While calculating meridional parts for Mercator sailing, there was an error when working with negative numbers.  The issue is now corrected.  Thank you ship’s Master Anastasios!

### 1.0 — 2017-12-01

No release notes.

## Apps similar to Nautical Calculator

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [EZ Celestial Navigation](https://appshunter.io/ios/app/ez-celestial-navigation/id1547239240) | 4.9 (25) | $29.99 | Navigation |
| [Sight Calc](https://appshunter.io/ios/app/sight-calc/id497809138) | 5.0 (7) | $1.99 | Navigation |
| [Celestial Nav](https://appshunter.io/ios/app/celestial-nav/id1569880598) | 4.3 (10) | Free | Navigation |
| [Nautical Calculator Preview](https://appshunter.io/ios/app/nautical-calculator-preview/id1534074231) | 5.0 (1) | Free | Navigation |
| [StarPilot](https://appshunter.io/ios/app/starpilot/id359071446) | 4.9 (8) | $49.99 | Navigation |
| [Nautical Charts & Maps](https://appshunter.io/ios/app/nautical-charts-and-maps/id1420774597) | 4.6 (3,780) | $8.99 | Navigation |

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- [Time Calculator For Pilots](https://appshunter.io/ios/app/time-calculator-for-pilots/id1096166900)
- [Aviation Sticker Pack](https://appshunter.io/ios/app/aviation-sticker-pack/id1202580215)

All apps by Aviation Mobile Apps, LLC.: https://appshunter.io/developer/286046308

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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 2026-08-25.*