qtVlm - Navigation and Weather Routing App

*This app requires Iridium Mail & Web or XGate app to download weather over Iridium.

qtVlm is a navigation software designed for sailing boats. It is also a free weather grib viewer that accepts all kinds of gribs. It can read and display maps in various formats, such as Vector charts (S57), Raster Charts (kaps, geotiff, etc) and mbtiles charts.

It includes an AIS module and an Instruments Module, that can retrieve data from various NMEA sources, or from internal GPS. It can also send performance data (VMG, target speed, etc) to a navigation system.

qVlm is able to calculate the best course using Routes and Weather Routings modules. Many options are available, like multi-routing to find the best departure date-time according to various parameters, routing on a pathway, or taking in account segments with engine for instance. qtVlm can acquire position and NMEA information via various sources (internal GPS, tcp, udp or gpsd), and can display many navigation instruments and performance data.

Technical Specifications & Features


Seller Meltemus SAS
Size 107 MB
Category Weather
Compatibility Requires iOS 8.0 or Later. Compatible with iPhone, iPad, and iPod Touch.
Age Rating Rated 4+
Copyright © 2015 Meltemus SAS
Price Free
In-App Purchases Full Version: $34.99