---
title: "TVMDC Sailing & Marine Navigation Calculator — App Overview"
url: https://marlvel.ai/intel-report/navigation/com-example-peteh007-tvmdc1
category: Navigation
developer: peter hopper
platforms: ios
rating: 3.0 (2 ratings)
pricing: paid
report_level: overview
generated: 2026-04-28
last_verified: "2026-04-28T05:55:54.459Z"
---

<!-- SECTION: Key Insight -->
> **Key Insight:** This is a niche utility app focused on simplifying manual navigation math for students and recreational sailors.

<!-- SECTION: Quick Facts -->
| Metric | Value |
|--------|-------|
| Category | Navigation |
| Rating | 3.0 ★ (2) |
| Pricing | paid |
| Platforms | iOS |
| Latest Version (iOS) | 4.0 |
| Developer | peter hopper |

<!-- SECTION: Summary -->
## What is TVMDC Sailing & Marine Navigation Calculator?

TVMDC Sailing & Marine Navigation Calculator is a specialized tool designed to assist sailors and navigators in performing essential chart-based calculations. The app streamlines the process of converting bearings and determining course corrections by accounting for variation, deviation, and environmental drift.

<!-- SECTION: Key Features -->
## Key Features

- **TVMDC Correction**: Provides instant conversion between True, Magnetic, and Compass bearings.
- **Set & Drift Calculation**: Calculates set and drift factors based on two known navigational fixes.
- **Course to Steer (CTS)**: Determines the required course to steer to a destination while factoring in TVMDC and set and drift corrections.
- **Magnetic Variation Management**: Allows for the input of local chart variation, annual magnetic increase, and specific boat compass deviation.

<!-- SECTION: Target Audience -->
## Who is it for?

Sailors and marine navigation students learning to work with nautical charts.

<!-- SECTION: Links -->
## Links

- [App Store](https://apps.apple.com/us/app/tvmdc-sailing-marine-navigation-calculator/id981722780?uo=2)
- [Full Intelligence Report](https://marlvel.ai/intel-report/navigation/com-example-peteh007-tvmdc1)

---
*This is an overview report. Sentiment analysis, competitive landscape, and SWOT analysis are available in the [full intelligence report](https://marlvel.ai/intel-report/navigation/com-example-peteh007-tvmdc1).*
*Generated by [Marlvel.ai](https://marlvel.ai) — Independent app intelligence.*