# CA'Sim — Collision Avoidance Simulator

> Collision Avoidance Simulator (iPhone/iPad app by Jatuphol Jaturapat.)

- Source: https://appshunter.io/ios/app/casim/id6758004211 (this page in markdown: same URL + `.md`)
- Developer: [Jatuphol Jaturapat](https://appshunter.io/developer/1788860463)
- Category: Education, Navigation
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 18.6 · 6 MB
- Languages: American English
- Released: 2026-01-21
- Data updated: 2026-08-26
- User reviews in markdown: https://appshunter.io/ios/app/casim/id6758004211/reviews.md

## What is CA'Sim?

Transform your device into a professional radar simulator and collision avoidance training tool. CASim is designed for maritime cadets, deck officers, and navigation enthusiasts who want to master the International Regulations for Preventing Collisions at Sea (COLREGs) through practical application.

Bridge the gap between theory and reality. Practice identifying risks on the radar scope, correlating them with visual aspects, and executing the correct maneuvering actions.

Key Features:

- Realistic Radar Simulator: Experience a fully functional Head-Up radar scope complete with variable range scales, target trails (history), and relative motion vectors.

- Tactical Plotting (MoBoard): Integrated digital Maneuvering Board. Plot targets manually or automatically to calculate CPA (Closest Point of Approach), TCPA, and determine the precise course to steer to avoid collisions.

- Visual Aspect Visualization: See what the target ship looks like in reality. The app generates 3D models with correct Navigation Lights (Night) and Day Shapes based on the target’s aspect angle.

- Restricted Visibility Mode: Simulate fog conditions (Rule 19). Test your ability to navigate using only radar and sound signals.

- Sound Signals: Authentic fog signals (Rule 35) are generated automatically based on the vessel type and status (Underway, Stopped, NUC, Anchored, etc.).

- Custom Scenarios: Create your own traffic situations with multiple targets, varying speeds, and ship types to challenge your skills.

Whether you are preparing for your competency exams or refreshing your skills, CASim provides the most comprehensive simulation environment right in your pocket.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Unlock All Features. (1 Month) | $0.99 | per month |
| Unlock All Features. (3 Months) | $2.99 | per 3 months |
| Unlock All Features. (1 Year) | $7.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Lifetime Access | $17.99 | one-time |



## Version history (last 5 releases)

### 26.8.1 — 2026-08-19

- Fixed minor bugs.

### 26.8 — 2026-08-17

- Fixed minor bugs.

### 26.7.1 — 2026-07-17

- Fixed minor bugs.

### 26.7 — 2026-07-15

- Maneuvering Board Mode Enhancements: Upgraded the maneuvering board simulation for smoother operation and better usability.
- Expanded Speed Vector Scales: Added more flexibility with selectable speed vector scales ranging from 1:1 up to 1:5.
- Dual Vector Display Modes: Seamlessly switch your plotting display between the ERM Velocity Triangle and the WOA Method.
- Flexible Vector Origin: Choose to position the start of your speed vector either at the Center or directly on the Target.
- New Bearing Indicator Ring: Added a clear compass rose indicator around the plotting circle for quicker, more accurate bearing readings.

### 26.6 — 2026-05-30

- Displays Collision Risk Index (CRI) calculation data.
- Fixed other minor bugs.

## Apps similar to CA'Sim

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [CES for Deck on Oil Tankers](https://appshunter.io/ios/app/ces-for-deck-on-oil-tankers/id6776197207) | — | Free | Education |
| [ATM Academy](https://appshunter.io/ios/app/atm-academy/id6767083171) | — | Free | Education |
| [CSM LearnStrike](https://appshunter.io/ios/app/csm-learnstrike/id6450264607) | — | Free | Education |
| [RadarPlot Pro Trainer](https://appshunter.io/ios/app/radarplot-pro-trainer/id6757932413) | — | Free | Education |
| [Master-Nav: COLREGS IALA Tests](https://appshunter.io/ios/app/master-nav-colregs-iala-tests/id6758554000) | — | Free | Education |
| [The Nautical Guyd](https://appshunter.io/ios/app/the-nautical-guyd/id6757754222) | — | Free | Education |

## More apps by Jatuphol Jaturapat

- [CanYouMultiply](https://appshunter.io/ios/app/canyoumultiply/id6740241998)
- [TwentyElement](https://appshunter.io/ios/app/twentyelement/id6740615385)
- [pHCalculation](https://appshunter.io/ios/app/phcalculation/id6743737030)
- [Unit Converter for Physics](https://appshunter.io/ios/app/unit-converter-for-physics/id6745997040)
- [Funny Vocab](https://appshunter.io/ios/app/funny-vocab/id6749760305)
- [re-Code](https://appshunter.io/ios/app/re-code/id6756342835)

All apps by Jatuphol Jaturapat: https://appshunter.io/developer/1788860463

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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 2026-08-26.*