qtVlm is a navigation software for Sailing Boats. The application has a free version with basic features and a full version available through in-app purchase.
The free version of qtVlm is a full grib viewer displaying all types of gribs and providing many advanced grib functions. It supports basics charts and some simple instruments. It includes also an Anchor Alarm module, a viewer for shapefiles, for instance those coming from SHOM, and can be configured to receive boat position either from internal GPS or from an external NMEA source connected through tcp, udp or gpsd.
The full version adds many functions and features:
- Weather routing and route modules,
- A complete set of navigation Instruments,
- Charts modules for Raster charts, Vector charts (S57, S63 and CM93) and mbtiles,
- Support for Harmonic files (tides and currents),
- Iridium GO! communication
- AIS,
- Start line mode,
- Access to Great Circle gribs,
qtVlm can also be used in Simulation Mode, which allows you to simulate a navigation through our server. This is the best way to learn using qtVlm.
Once activated the full version will be available on all your iOS devices.
I have used both the Mac OS and IOS app versions of this excellent, versatile routing software for racing offshore in the NE USA over the last 6 years. It integrates seamlessly with the NKE equipment on the boat and my Iridium Go for satellite based downloads of grib files. It is intuitive to use and has an astonishing array of features from boat polars to being able to overlay charts with wind and tidal current data as well as having full AIS compatibility. Not only does it work out routings for you but is also a very effective chartplotter for a fraction of the price of dedicated marine equipment. During the off season I use it in virtual mode for on line sailing racing to try and sharpen my navigation skills and strategic decision making. On top of all this the developer is continually refining and adding new features and has always been very quick to respond to any questions I have had. Highly recommend it.
New internal compass sensor management (including vertical mount). New instruments CS and CD, replacing CSCD. Add an option to compensate AWA/AWS using heel. TWA/TWD are now calculated against CTW/STW instead of HDG/STW. In pressure histogram, add an option to compare boat pressure measures to grib pressure data.
Improvements in Meltemus Gribs downloads. Better grib color bar placement and size management.
Improvements when routings on ensemble gribs and on pathways.
Version 5.12.2400
The developer, Meltemus SAS, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Seller
Meltemus SAS
Size
99.6 MB
Category
Navigation
Compatibility
Requires iOS 12.0 or later.
iPhone Requires iOS 12.0 or later.
iPad Requires iPadOS 12.0 or later.
iPod touch Requires iOS 12.0 or later.
Apple Vision Requires visionOS 1.0 or later.
Location
This app may use your location even when it isn’t open, which can decrease device battery life.
