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Navigation and Weather Routing software

4.2 Stars (8)
2,071 Downloads (This Week)
Last Update:
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qtVlm is a Navigation and a Weather Routing software for sailing boats.

It can be used in two modes:

- Real Navigation with NMEA data and instruments, AIS, Routing, etc.
- Virtual Racing mode designed to manage and pilot virtual boats, for instance VLM.

qtVlm accepts charts in raster format (kaps, geotiff, etc) or in mbtiles format, and can also load online maps from various sources.

It is also a general grib viewer, and can read all known grib sources, format 1 or 2.

qtVlm is also available on Android and iOS, through the respective stores.

Please use qtVlm forum to report bugs and feature requests. Link can be found in qtVlm help menu. We cannot reply to reviews.

Documentation in English: http://www.virtual-winds.org/maitai/qtVlm_documentation_en.pdf
Documentation en Français: http://www.virtual-winds.org/maitai/qtVlm_documentation_fr.pdf

qtVlm Web Site


  • Grib viewer
  • Navigation Instruments
  • Weather Routing
  • Raster charts
  • mbtiles


User Ratings

ease 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 4 / 5
features 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 4 / 5
design 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 4 / 5
support 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 4 / 5
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User Reviews

  • 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5

    qtVlm works on Sierra. Take the latest version and follow instructions for installing. Do NOT try to run it directly from the dmg.

    Posted 11/02/2016
  • 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5

    Hi, Release / MAC OS / qtvlm macOS v5.4.2.dmg seems not working. From the start of the installation, a message states: "Unable to write in qtVlm folder /Volumes/qtVlm_5.4.2/qtVlm/testWrite.txt. Thnks for your help

    Posted 11/01/2016
  • 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5

    Hi Visit the blog "Zona OpenGTS" (www) zona-opengts.blogspot.com Thanks !!!

    Posted 09/10/2016
  • 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5

    Ma premiere intervention ici avec un tres grand respect pour le travail fait et les hommes qui y participent. OUBLIEZ CA IL SUFFIT DE FERMER ET RELANCER LE COMPARATEUR ET C'EST BON Desole de ne pas avoir teste ca avant. Du coup, je pense que vous avez plein d'autres interventions avant celle-ci :-D Un petit bug dans le comparateur de route : la hauteur des vagues n'est pas reinitialisee entre les differentes routes et c'est donc toujours la hauteur de la premiere route affichee qui est indiquee pour toutes les routes ( ca ressmble a un RAZ de la zone manquant ou une gestion d'index erronee). Comme je suis en Mode Bateau Reel, cette donnee est relativement significative pour moi (choix de date de depart ou option de routes differentes, etc..) et c'est comme ca que je me suis apercu de ce leger bug. Je suis aujourd'hui en version 5.1-81 sous Windows 8.1, mais j'avais deja remarque ce bugg dans la version 3.xx sous W7. Merci pour votre temps et votre comprehension. Serge First intervention here with great respect for the team ,-) I notice a small bug in the "routes compator" form : waves heights columns are always taking the first reading for the first route added in the comparator ( so you cannot compare different routes on this). (Looks like a no initialisation of the form's area before or wrong index tuning for the area). I didn't check values for the others datas as they looked pretty logical for me,but???? Obviously, I'm using QtVlm for "real boat". I'm using the 5.1-81 version under Windows 8.1 but noticed this bug on 3.xx versions under W7. Thank you for all the understanding and time consumming.

    Posted 11/29/2015
  • 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5

    Linux 64 (qtVlm-5.0.27_64) When I load the data from VLM, I got /home/my_user/qtVlm/mediaservice/libgstmediaplayer.so: undefined symbol: _Z22qt_gst_object_ref_sinkPv and qtVlm stop short

    Posted 10/20/2015
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Additional Project Details


French, Czech, English, Spanish

Intended Audience

End Users/Desktop

User Interface


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