# Marine Radar

> iOS app to view and control Furuno Wireless Radar Sensor DRS4W images. (iPhone/iPad app by 株式会社フルノソフテック.)

- Source: https://appshunter.io/ios/app/marine-radar/id834243448 (this page in markdown: same URL + `.md`)
- Developer: [株式会社フルノソフテック](https://appshunter.io/developer/1015812767)
- Category: Navigation
- Price: Free
- Rating: 2.70/5 from 12 App Store ratings · 10 written reviews indexed
- Age rating: 4+
- Requires: iOS 8.0 · 11 MB
- Languages: American English
- Released: 2014-04-18
- Data updated: 2026-06-07
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/marine-radar/id834243448/reviews.md

## What is Marine Radar?

Descriptions:
This Marine Radar App, in connection with the Furuno Wireless Radar Sensor DRS4W, enables to view and control Radar images on iOS devices.

How to use:
Get the Marine Radar App installed on your device. Connect your device to the DRS4W and launch the app to view the Radar images. For detailed setup and operation procedures, see the operation manual enclosed with the DRS4W.

NOTE:
This application is aimed for the help of the voyage. Electronic aids are not a replacement for basic navigation principles and common sense.

NOTE for use in Japan:
This application can be used only in situations where GP-1x71F of FURUNO Chart Plotter is equipped at the same time.

## Key features

- View radar images on iOS devices
- Control radar images
- Connects to Furuno Wireless Radar Sensor DRS4W
- Aids in voyage
- Requires compatible Furuno hardware

## Recent user reviews (10 of 10)

All indexed reviews: https://appshunter.io/ios/app/marine-radar/id834243448/reviews.md

### 5/5 — Works, but without map integration.

*2024-09-18*

If you just want a separate radar display on your iPad then this app works very well. It supports all of the features of the Furuno DRS4W radar.

The DRS4W radar can also be integrated with the TZ iBoat app to overlay the radar image onto navigation charts.

### 1/5 — Apps crashes when opening

*2023-04-01, version 2.0.0*

I just bought this radar and have installed it, connected the network it provides and when opening the app it crashes on the first or second screen on startup, never recovers and must install and reinstall again and again to only get the same issue. I am using my IPhone now, I am going to try my ipad and see if it does the same thing. If so, going for a return and choose another supplier.

### 1/5 — Not great

*2023-01-26, version 2.0.0*

It would be wonderful if they updated the application to make the radar actually useful. App hasn’t been updated in years. Radar system is pretty much trash.

### 5/5 — For Mr. Newsome’s peace of mind -

*2022-11-21, version 2.0.0*

I know you’re going to read these reviews-  I’ve never had an issue with this system and have been using it since 2016.

### 4/5 — Worked for me

*2021-07-05, version 2.0.0*

Turned my new DRS4W on.  Logged my iPad on to its WiFi using the supplied password. Started using the App which failed to find the Radar the first couple of tries but then worked well. The Radar picture isn’t the best I’ve seen but is pretty good and enough for my purposes.  It would be good if it was possible to place a distance/bearing line onto the display and have it stay until cleared and have it use either a true or magnetic bearing, then it wouldn’t matter if I altered course.

### 1/5 — Radar

*2020-09-26, version 2.0.0*

Can’t get it to work

### 1/5 — Won’t run

*2020-09-12, version 2.0.0*

Says no radar powered? Seems to need WiFi but I’m using 4G.

### 1/5 — Marine Radar

*2020-07-13, version 2.0.0*

It won’t open. It says no radar available. So totally useless.

### 1/5 — Useless for collision avoidance

*2020-03-19, version 2.0.0*

I have now used the DRS4W for a cruise from the Virgin Islands to Trinidad. As a trained radar operator I can state that this radar is useless for collision avoidance which is the primary purpose of radar. It has no usable EBL that one would normally use to track an approaching vessel. There is a great little curser that can be set by tapping the screen. This can be run out to a target to note bearing and distance. But this disappears in a few seconds. If this was to stay in place one could track the bearing of the approaching vessel. If the vessel continues down the line, that is a constant bearing situation with decreasing range. COLLISION! But sadly their curser (EBL and VRM combined) doesn’t stay on.

Sadly his would be a simple software fix, but after contacting Furuno they are not interesting in making the change. Because this is an “inexpensive System”.

Also, to make the radar easier to use Furuno has dialed back the gain on rain and sea clutter. It actually does a good job of eliminating all the clutter so large land masses are see able. But a large incoming squall at 6 miles is not even visible on the screen. Neither are small sailboats with radar reflectors at 2 miles. I also did a test with Sail Rock off St Thomas. A solid 128’ high rock and the DRS4W could not pick it up at 8 miles. I also could not see the island of St Bart’s when 8 miles out. Now if you could back off on the sea clutter a bit more you could probably see this target. Of course you would have some more screen noise, but the target would be also visible. The manual adjustment available does not go anywhere close to usable.

So, collision avoidance and weather, two primary uses for radar are basically none existent on this unit. Plus more than a few miles out you can’t even pick up an island.

I do not recommend the radar or the app.

### 5/5 — Finally, reliability and portability with IOS

*2015-05-28, version 1.0.1*

I purchased the radar after my previous 29 year old Furuno was laid to rest. Wanting to have dual stations for my radar was my first priority. Second, was looking for something to run on the iOS platform, allowing me to access the radar without the expense of purchasing a monitor or two, and having the ability to have the clarity that my iPhone and iPad screen offers. After several voyages, I can honestly say they I would trust the images through pea soup fog or dead of night voyages. I highly recommend the radar and app. As for previous fears of not being able to see the screen in sunlight, I clearly read the I images even with my polarized sun glasses on!

## Frequently asked questions about Marine Radar

### What is Marine Radar used for?

Marine Radar allows you to view and control radar images from a compatible Furuno Wireless Radar Sensor DRS4W directly on your iOS device. It serves as an electronic aid to assist with your voyage.

### Does Marine Radar work without a Furuno radar sensor?

No, Marine Radar requires a connection to the Furuno Wireless Radar Sensor DRS4W to function. The app itself does not generate radar data.

### Is Marine Radar a replacement for traditional navigation?

The app's description explicitly states that electronic aids are not a replacement for basic navigation principles and common sense. It is intended as a supplementary tool.

### What devices support Marine Radar?

Marine Radar is supported on iPhone, iPad, and iPod devices. It is designed for iOS operating systems.

### How often is Marine Radar updated?

The latest version, 2.1.3, was released on April 22, 2024. The app is updated periodically to maintain compatibility and functionality.

### What is the age rating for Marine Radar?

Marine Radar has an age rating of 4+. This indicates it is suitable for users of all ages, with no mature content.

### Can Marine Radar be used in Japan?

In Japan, Marine Radar can only be used when a FURUNO Chart Plotter GP-1x71F is also equipped. Specific regional limitations apply.

### What is the user rating for Marine Radar?

Marine Radar has a rating of 2.7 stars based on 12 ratings. This suggests a mixed reception from its user base.

## Version history (last 5 releases)

### 2.1.3 — 2024-04-22

Improved menu display.

### 2.1.2 — 2023-05-15

- Display operational caution message at initial startup

### 2.0.0 — 2015-11-15

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

New with Version 2.0.0
- Guard Zone Alarm
When a target enters or leaves the preset area, your iPad or iPhone alerts you by sound and/or vibration. (This function does not work in background.)
- Sound and vibration on/off settings (vibration for iPhone only)
- Range & Bearing Box for iPhone (already available on iPad)
- Display Lock function (iPhone only)
- Auto-Lock deactivated while the app is running on the screen
- Bug fix on iOS9

### 1.0.2 — 2015-07-13

1.iOS8 and iPhone6, iPhone 6 plus support
2.64-bit support
3.Minor bug fixes

### 1.0.1 — 2014-04-12

1.Improved drawing radar echo
2.Minor bug fixes

## Apps similar to Marine Radar

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## More apps by 株式会社フルノソフテック

- [NavNet - Remote](https://appshunter.io/ios/app/navnet-remote/id502449862)
- [NavNet - Viewer](https://appshunter.io/ios/app/navnet-viewer/id502473092)
- [Marine Radar Simulator](https://appshunter.io/ios/app/marine-radar-simulator/id906962243)
- [NavNetController](https://appshunter.io/ios/app/navnetcontroller/id1015812768)
- [TZ First Mate](https://appshunter.io/ios/app/tz-first-mate/id1498838385)

All apps by 株式会社フルノソフテック: https://appshunter.io/developer/1015812767

## Related topics

[marine radar](https://appshunter.io/ios/topics/marine-radar)

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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 2026-06-07.*