Reg Fail
"even though there are a number of examples of it not working as well as established technologies such as Ordnance Survey or GPS coordinates."
I really didn't expect El Reg, of all organs, to quote that article with nary a raised eyebrow. Here are those examples:
jump.legend.warblers which was in Vietnam
duties.factory.person was located in China
dignitary.fake.view turned out to be in India
refuse.housework.housebound was in Australia
middle.plugged.nourished was in the US
demand.heave.surprise was actually in Canada
flesh.unzip.whirlwind was in Russia
Now, what I deduce from this is that Mark Lewis, provider of these examples and head of ICT at Mountain Rescue England and Wales is being, hopefully uncharacteristically, a fucking moron. Every single example here is of W3W working as advertised* --- get it wrong and the implicit checksum "is it in remotely the right place" doesn't match. Did he dispatch a fucking crew on the Mountain Rescue Heli and after several hours they said, oh, hold on, why are we going to Vietnam? Of course not. Mangle a number (which people, in my experience, do more often than they mangle words) in a grid reference and you can easily be, depending on the decimal position of the error, between 100s of metres and 10s of kms out. This is the danger zone for search and rescue: it's only if you mangle the first few digits that it would be obvious numerical coords were wrong. W3W is explicitly designed to give you an impossibly distant location if you cock it up, whichever of the three words you bork, and that is precisely what these examples show!
Andrew TIerney, also referenced in that abysmal BBC report (which - did I say? - I'd have expected El Reg to approach in somewhat more sceptical mindset) has at least got the right idea but is also, IMNSHO, really pushing his luck in terms of not coming across as a numpty.
"for example, circle.goal.leader and circle.goals.leader are less than 1.2 miles (2km) apart along the River Thames."
This is apparently the best example he has got and 2km is well in the danger zone, so obviously a bit of a W3W failure. But hold on, one of these is in the fucking river! So if, as an emergency operator, I looked up the location, I'm pretty sure I could tell, depending on the nature of the emergency, if I'd got the wrong one.
So, I've been a bit rude about two people, apologies. I should be clear --- I'm not casting aspersions on their general character. They might be very sensible people who are just being a bit spectacularly dim at the moment. We've all done it, me more than most (my first attempt at posting this rant somehow saw it on the Starliner article!). But the person who really needs to hang their head in shame here is the El Reg journo who just parsed and absorbed the BBC article without remembering that almost any sci/tech story in the BBC is wrong, almost by definition.
* I, too, have concerns about its proprietary nature, etc., but let's just deal with their claims for the moment.