Coming soon on your phone – one metre accuracy

It seems that while my phone is accurate to an error of considerably less than 10 metres, the industry is heading to even better precision of a tenth of that level, and soon. This post looks at why that means satellite accuracy on all devices including smartphones is reaching levels where there are diminishing returns for small boat sailors. That’s the main conclusion I draw from what I’ve learnt.

In general, 5 metre satellite accuracy has been available on smartphones for a considerable time now. I give links at the end to industry, US government, academic and consumer articles that give more detail on how accuracy has been developing (and see also my earlier post ‘and a phone to steer her by’).

One of the secrets of the top performers such as the high-end Samsung phones is that they now have dual frequency satellite aerials so they can make the best use of the latest improvements not only in the US GPS, but the Russian Glonass, European Galileo and Chinese Beidou satellite systems. Nowadays, phones will often have as many as 40 satellites in the sky from which to choose the best signals.

Continue reading “Coming soon on your phone – one metre accuracy”

…and a phone to steer her by

Mobiles have had a bad press as navigational tools, but if I were forced to choose one single piece of electronics to take to sea it would be my phone. That’s not a popular view among professionals.

Instructors, coastguards and rescue services learn of many cases where boat owners, especially of powerful motor yachts and RIBs, set off for the open sea with nothing beyond a chart app on a mobile phone, and no knowledge of the underlying skills needed to navigate safely. For the Royal Yachting Association, mobiles are well down the list of recommended priorities, because of the risk that they will be used badly. Textbooks give stern warnings that you must not use them for navigation.

Continue reading “…and a phone to steer her by”

Battles over flares

In one corner, the Royal Yachting Association, declaring pyrotechnic flares are obsolete. In the other, the UK Maritime and Coastguard Agency, pointedly renewing for another 2 years its ruling that flares are mandatory under the Safety of Life at Sea (SOLAS) convention, though softening it a little round the edges.

What does it actually mean for a typical small yacht? The crucial issue here is that SOLAS distress signals are only a legal obligation for yachts above 13.7 m or on smaller craft licensed for commercial use, including sail training. They must carry flares. This means if you charter a yacht, it has to have them. The RYA has, however, won a dispensation allowing private yachts from 13.7 to 24 metres to at least dispense with parachute rockets, easily the least useful and most hazardous in use of the flares. Continue reading “Battles over flares”

Bowsprit – pronounced bow, bo’ or bogh?

How do you pronounce bowsprit? I’m usually against language pedants, who try to foist the views of Victorian grammarians onto the 21st century. But this word is my one little obsession, ever since getting a letter into Yachting Monthly on whether the first syllable of bowsprit should rhyme with dough or cow.

I was reminded by contemplation of this lovely boat recently.

I can’t remember why or when, but I learnt to pronounce bowsprit to rhyme with dough as a child. In fact, the similar word bowline is always pronounced like dough. Continue reading “Bowsprit – pronounced bow, bo’ or bogh?”

New engine calculations

A new engine is a big challenge, not just financially but in the thought process running up to the decision.

Our Volvo is 30 years old and we had it taken out and largely rebuilt 10 years ago. It has been reliable since then but this winter it has been increasingly difficult to start, and the expert verdict was that the valves probably needed regrinding. Continue reading “New engine calculations”

Useless marina internet

Marina internet is a waste of time. It’s fun doing a live blog of a cruise, but it was so difficult to get web access on our 900 mile round trip to the Morbihan this summer that I failed to file anything en route, and will do a single post later.

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How we got marina wi-fi in Vannes, but nowhere near the boat. (The jacket shelters the tablet from the rain).

Every single marina over 4 weeks advertised wi-fi, and only one actually delivered it in practice at a decent speed, with the rest either intermittent and unworkably slow, available only a few yards from the marina office, or simply not showing up on my tablet’s wi-fi source list. Some marinas openly confessed to technical problems, others were incredulous at our inability to log on. At most marinas, it was a cheek to advertise wi-fi at all. Maybe sailing magazines should be taking this on as a campaign.

There were cafes and restaurants, of course, but we went to drink and eat not write in a corner. I’ve also filed posts in the past from my phone using 3G, but we seem to have consistently chosen places where the 3G signal was poor, so that didn’t solve the problem either.

Fitting out at Ardoran, 4 -11 May

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First launch….

We arrived at Ardoran Marine on 4 May to stay at one of the three chalets the boatyard owns, with a few days fitting out planned. (Peter, Christine, Tony, Elaine and Nigel). Ardoran stores boats in an old quarry behind the main workshop, and we found Spring Fever in excellent condition, dry inside and well cared for, with the anti-fouling done ( a present to ourselves because of the 500 mile drive to reach her.) Continue reading “Fitting out at Ardoran, 4 -11 May”