Publié: October 30, 2014
Navionics constantly improves SonarCharts™, its HD bathymetry map, by integrating sonar logs shared by individual users with existing data and receives Sonar Logs from all types of craft – from kayaks to ocean crossing yachts, but surely the restored vessel, HMS Medusa, is a unique contributor.
Built in 1943, Medusa, a Harbour Defence Motor Launch, had a distinguished record in World War II and is the last surviving vessel to have been at Omaha Beach, Normandy on D-Day on 5th June 1944 where she served as a Navigation Leader. In June, 2014 she once more visited Normandy and took part in the commemoration to mark the 70th anniversary of the D-Day landings, she went to the same position, at the edge of the minefield, as she had been on the night of 5/6th June 1944.
Prior to leaving for the trip to France she was open to the public at Portsmouth where many visitors attended, along with veterans from the Second World War, and was honoured with an official visit by HRH The Princess Royal with the last crew Member from D-Day, Doug Withey and her last naval Captain, Admiral Roger Morris on board.
The skipper of Medusa is Alan Watson. Alan, an RYA Instructor and Raymarine trainer, is a regular contributor of sonar logs to Navionics through the Raymarine system on board his yacht, “Trinity Star”. So, Navionics were delighted to hear that he was also contributing logs via the Raymarine system on Medusa.
On 7th June early morning, Medusa and her crew left Haslar to arrive at Caen, on the French side of the English Channel. Upon arrival in France she made an impressive site outside the lock at Ouistreham and at the famous Pegasus Bridge, where there was a crown to welcome her, complete with piper.
Medusa recorded sonar logs for much of the time during the trip to Normandy. Alan commented, “From the early days as a beta tester of the system, I’ve been delighted to provide numerous sonar logs to Navionics and I took the opportunity of this historical trip to continue sonar log collection. Once the logs are processed and the updated charts are published by Navionics, I see my contribution to improving the charts for the good of seagoing community. I would encourage all boaters to do the same”.
Navionics UK General Manager, Lance Godefroy added, “Alan has been an enthusiastic and regular contributor of sonar logs. He has realized that the collection of logs is a very simple process which greatly benefits the boating community”.
Medusa touched other locations like the Mulberry harbor at Arromanches, Port en Bessin, Omaha Beach and Cherbourg on the French north coast and finally arrived at 50 05N 000 46.7W, the exact spot she was 70 years before.
A historical event like this is a great occasion for collecting unprecedented sonar logs but simply recording anytime you go boating and sharing logs with Navionics is the best way to gain an enhanced SonarCharts™ in your favourite and daily spots!
You can record sonar logs now and see more detail each time you launch your boat:
- Record without any special effort: Navionics accepts sonar logs from all major sonar brands, like Humminbird, Lowrance, Raymarine, Simrad, B&G, and Garmin. Further, this can be done also using your iPhone or iPad thanks to the amazing SonarPhone feature, which you can find in all Navionics Boating apps available on iTunes store.
- See more details: You can get SonarCharts™ with plotter products like Navionics+, Navionics Updates (for Gold and HotMaps Premium), Platinum+ and HotMaps Platinum. On mobile and PC, you can find it in any Navionics Boating app on Apple, Android and Windows. Further, you can view it for free on our WebApp!
For more information on SonarCharts™ and on how to record logs click here.
From Medusa’s navigation system: Navionics cartography shows her on the exact spot as D Day, surrounded by wrecks from that period.