The images come ...

AIS, VHF/DSC radio and LEDs lights

led_bayonnetteThe Department of Ecology, Sustainable Development and Energy, has published in date of 4 August a boating safety alert about LEDs bulbs (¹). The text warns boaters on the risks of radio interference found where the VHF antennas are close to navigation lights or bridge lamps equipped with LEDs bulbs.

Actually, some LEDs (Light-Emitting Diode) can cause electromagnetic interference disrupting radio frequencies as the VHF transmissions, causing losses in the AIS data transmission, and also that of the GPS data by VHF transmitters with Digital Selective Call in the event of a distress signal. These interferences are generally due to bad bulbs power supply and shield design


Does Navionics charting become dangerous ?

Since the beginning of the navigation season, many boaters have found an increasing number of errors on Navionics charts, as a result of recent updates, all media. A bit everywhere in Europe, Germany, Baltic countries, French coasts of the Channel and until Spain, appeared non-existent channels and erroneous soundings, missing soundings, missing information, contradictory bathymetric information depending on the zoom levels, and so on. The most important is that these findings are made by assiduous users of long-standing Navionics cartography, experienced navigators. (continue…)

Iridium GO! finally corrects its shortcomings

Iridium has just published an update of its Iridium GO device firmware! correcting a number of dysfunctions, including the slowness of data transfers (Messaging, GRIB files, aso.) but also recurrent problems of voice connection with the network. (continue…)

Météo-France GRIB files finally for free

A year after my advocacy for free European data (¹) Météo-France finally offers free access to its two famous ARPEGE and AROME models. A welcome development, initiated in 2014 by the success of MyOcean project, Since then integrated into Mercator Ocean (²), but a notorious change in attitude for a public institution to which always asked to self-finance a significant portion of its budget. Forecasts from these two models are made available on Météo-France portal in the GRIB version 2 format. Since the 21 st of July 2015.


VirtualBox : increase the size of virtual disk [Update]

virtualboxVirtualBox allows me on my MacBook, for a while, to use some applications unavailable with OSX. In example, Some applications of configuration. I produced, from my website, a video tutorial regarding the installation of a Windows system 7 on a Mac with VirtualBox.

At the first installation, the application allows to create a default dynamic virtual disk 20 GB. The word « dynamic» means that the actual size used by the virtual volume will be those installed files, and that this size will increase with new files created, up to a maximum of 20 GB. As Windows 7 system needs only 12 up to 13 GB space, that seems actually enough and one do not change this size.

But today, with more and more applications, my virtual disk is full. I cannot add more files, nor proceed the major update, as the Service Pack 1 recently available. Do not panic. Since version 4.0 VirtualBox allows you to increase the size of the virtual disk.

[SHIFT version 5.0] (continue…)

Use your iPhone as GPS for iPad Wi - Fi

Doing follow-up to my recent post on GPS2IP, to use (tentatively) of an iPhone GPS to transmit the position to MacENC on Mac, You can also do the same for an iPad Wi - Fi with no GPS.

But, again, This method should only be seen as a temporary troubleshooting for the reasons which will be discussed later. The NMEA position data will be sent by GPS2IP using the TCP/IP protocol with cellular connection sharing.


The American GPS evolving

As the number of receivers GPS greatly increases, so does our dependency on the GPS, but satellites are subject to wear out and age.

THE U.S. Air Force launches since 2010 the second constellation of GPS satellites, named GPS Block IIF, or GPS IIF, built by Boeing. These satellites will replace the GPS IIA of the first constellation satellites, launched between 1990 and 1997, with lifespan design about 7,5 years.


Recharge mobile phones on board

This summer, It's decided, We rent a large catamaran in family ! Finally, would be better to say "in extended family. : four adults, two older teens + their respective boyfriend-girlfriend + a child of 11 years. It has thought of everything : journey, victualling, clothing, Sun creams, sunglasses, caps, masks and snorkels, fishing lines… about ! A week before our departure, the skipper has whispered :

-You thought to charge phones ?
There, a silence, then the response :
-UH, no, what for ?
-You will be new on board, It's been so many smartphones and certainly half of tablets… and there are only two plugs cigarette lighter on the boat !


Celestial, navigation on iPhone and iPad [Update]

Company Navimatics Corp, located near Seattle, state of Washington, moved since October 2010 a complete application for celestial navigation. for iPhone, iPad, and also Mobile Android . It comes to be updated in version 1.5 with a new interface compliant iOS 8/9. (continue…)

Connect an iPhone over Wi - Fi to a Mac [Ad - hoc network]

In my former video tutorial iNavX n°2 – The advanced, I explained (minute 15'45 '') How to connect Wi - Fi iNavX on iPhone and MacENC on a Mac via the TCP/IP protocol.

However, for Mac beginners, or those still not well versed in network settings for OS X, Here is the - simple - method for creating your beautiful ship a private Wi - Fi network, says "ad - hoc" network, network between your Mac and your iPhone. (continue…)