* Posts by diver_dave

48 posts • joined 2 Sep 2009

Suunto settles scary scuba screwup for $50m: 'Faulty' dive computer hardware and software put explorers in peril



The whole 10 day cave syllabus is designed around accident analysis. This boils down to three main causes (omitting stupidity)

1- incorrect gas planning. Law of thirds. One third in. One third out and one third reserve.

2- failing to mark lines/visual rather than phsically linked jumps.

3- failure of light source.

Again, like flying it is another swiss cheese.

Unfortunately I was right in the middle of one in 2016 in Tulum. Having to do a body recovery after someone who should have known much better screwed up. Very unpleasant.



Gas calculations

Oddly enough.

I do that in my head constantly throughout the dive. Although I admit I cannot dive in Imperial.

I know my tidal rate is 18l per minute. So 36l at 20m.

I then double it to allow for increased workload.

My normal buddy (SWIMBO- has a much lower rate than me and normally dives a smaller tank.

Our predive planning aleays includes my gas failing amd us bailing out onto her tank. Again allowing for deco and increased consumption.

Always plan plan plan...



Dive computers aren't a replacement for a brain.


With OC cave diving I carry with manifolded twins. 2 computers and an independent SPG that gets regularly checked.

Dive plan and turn pressures are also on a arm slate so I don't fumble or them in an emergency. Additionally, I have a nice Dive Rite slate that has 2 layers so I also do a sketch map of the cave.

Interestingly. You missed the fact that over half the rebreather course is spent in emergency drills and driving the unit manually.

Still sticking with OC I think...





Watches are very rarely as waterproof as they say. There is a massive amount of fiddle room when it comes to exactly HOW water tight they are.

Computers give you essentially:


Dive time elapsed

Time until you need to make decompression stops.

If in decompression. What stops you need to make to offgas.

In my case my computer also shows, via a little wireless transmitter, the remaining contents in my tank.

Essentially.... It is telling you how to not die.

Now, I actually had a problem with a different brand.

With these computers they tend to decide your battery life is not allowed to go below 55%. After that the unit shuts down.

On a dive a few years ago I had the unit suddenly start displaying very odd content readings. 180bar suddenly dropped to 130 then 45 then back to 150 and the unit locked up. Dive aborted after 5 minutes.

I now have a seperate contents gauge as well.

However, you still need time and depth as well.

Especially in a cave in Mexico.

Safe diving all..


Montezuma's Revenge can finally be laid to rest as Uber AI researchers crack the classic game


Other challenges

How about giving it a crack at Starquake.

Very different every time. Goal objects change every game as do key locations....

I love my Speccie EMU.....


The best way to screw the competition? Do what they can't, in a fraction of the time


Non IT angle

Several years ago I was teaching for a dive school in Malta.

One of the dives, the Um El Faroud, is spectacular. However given Maltese traffic upto an hours drive.

We get there and one client has forgotten his BCD. Now I love the Faroud and this was also to be a proper push dive right into the engine room.

No problem says I... Customer Service time. Lend the customer my BCD and sit out the dive.

50 minutes later the group surface.

Customer hands me my BCD back. I ask how dive was.

"Yeah.... Noce dive but the Jackets a bit sh*t...."



Overexcitable UK ads regulator gabbles that Amazon broke EU law



Or hammers...

Nothing that can't be fixed with a bigger hammer.

Spent your week box-ticking? It can't be as bad as the folk at this firm



Sounds like a well known large telecommunications company who quoted £400+vat to add one field to a custom report they had built for Symposium [×]

Ended up scripting a merge for the two reports that would then give the required output. Sum of 2hrs work....


[×] May have given it away there!


Re: Cheaper option

See the BOFH on how document management systems REALLY work.

Brit teen pleads guilty to Minecraft-linked bomb and airline hoaxes

This post has been deleted by a moderator



got to be Lemonfield...

never trusted anyone from there :-)

Trainer regrets giving straight answer to staffer's odd question


Re: I wish I knew that 15 years ago

That's the one.

Not fueled by caffine!


Should have added

Same 'client who wanted us to re-cable every desk in the building because she

shoved her bag under so far it kept pushing the phone cable out.

I *really really* should have expected the worse.

Did I mention *really*?


Re: I wish I knew that 15 years ago

Old BT M3710 turret.

User (By phone on next desk): My turret isn't working

Me: What's it doing?

User: Display is black and it's not giving a dial tone when I select a line.

Me: Has anything happened? Has cable been knocked out? (Long shot but not unknown)

User: No nothing.

Me: Ok let me test line. (I get nothing so turret is DOA)

Me: On my way with a replacement. (Down 5 flights of stairs)

On arriving, turret is definitely dead with black LCD screen. I pick it up to change it and....

Get a sleeveful of cold coffee.

User: Ah, would that stop it working.

Of course 8AM on a Monday morning.

Probably worth noting the user was one of my more challenging customers.


ZX Spectrum reboot scandal: Directors quit, new sack effort started


Is there...............

Enough popcorn in the world for this?

Oh, and, exactly HOW much popcorn is too much?


Lawyers sued for impersonating rival firm online to steal clients


Re: Not Just Lawyers

Ah yes.....

The great undertaking....


Space, the final Trump-tier: America to beam up $8bn for Space Force



NASA already got there. No need for anything new, just ask J. Michael Straczynski...


Now this is what I think the Orange one wants:

I give you..... SpaceForce 1


Have a good weekend all....


Re: Excellent sub-head!

"Never underestimate the power of human stupidity".

Notebooks of Lazarus Long. R.A.H.

Never a truer word, never a truer word.....

Google Spectre whizz kicked out of Caesars, blocked from DEF CON over hack 'attack' tweet



Give it it's due.

It does have some good beer and curry houses.


Tech team trapped in data centre as hypoxic gas flooded in. Again


Re: Never do this

Agree completely...

However for shits and giggles the fire marshal course in Malta cannot be beaten.

You try: Dry powder, CO2, Water and Inert gas extinguishers. A fire blanket on a real oil pan fire. Then AFTER lunch..... They set a wood fire in a cargo container and get three of you to crack the door carrying a hose. Loads of fun(in a controlled situation) but shows exactly what flash over looks like.

Possible the best course I have ever been on.



Re: Buncefield

*Age Warning*

I remember Flixborough from my dim and distant youth.

The odd thing with these kind of incidents that pressure / blast wave propagation is a bit like the three body problem on steroids! https://en.wikipedia.org/wiki/Three-body_problem

Waves tend to do some very strange things as you get reinforcements and waves cancelling each other out. Some can be predicted such as directing force for demolitions, however, there is always a risk factor.

IIRC. Buncefield was very directional due to the nature of the initial blast and then the secondary's changing the blast wave following the initial FAE.

Although even with some predictability, it's still Russian Roulette. Unless of course you are in a lead lined fridge!


Look I hate to say this lads, but this thing really is going to blow up!


Ok, oo-kay.

[Massive explosion! ! !]



I was living in Watford at the time...

Felt the windows move as the Munro effect manifested itself.

That said, I have a friend who had just moved to Adeyfield (sp?) and all they heard was

a whoosh, then all the leaves were cleared from the street. No damage at all!

Very scary morning for all, Kudos to the FRS who had no idea how bad it was when they went in.


Drug cops stopped techie's upgrade to question him for hours. About everything



Oz is ok... NZ would have been better. It's further...


That's the one.

Accessed via Charter Place next to Allsports. Up onto the roof and walk round. I suppose carrying a drill with a bloody great bit in it didn't help much..

Just to show my age. I do remember Cordelles before Charter Place existed, and throwing washing up liquid in the fountain outside C&A.

Last time I was there I got lost driving from Rickmansworth to North Watford. What the ***! have they done to Rickey Rd.....


Haven't been back in years.

Gravel/concrete roofs hurt!



Again in the 80's...

Was installing Christmas lights in Watford town center. Big heavy buggers (no LED back then) so catinery wires required.

Working on the roof I had to hop over a dwarf wall to get where I needed to anchor the cable.

5 minutes later I was pinned to the gravel floor by three of her Majesties finest being shouted at.

Probably should have told Lloyds first!


Trainee techie ran away and hid after screwing up a job, literally


Re: Key word is "Trainee"

Exactly! That's what I'm talking about. Sure, they're doing something that is relatively easy, but they are learning something relevant. This part is called X. It is part of that thing over there, and it performs task Y.

Catering collage... The first class is always cleaning. You don't even get to make the mess yourself! Other classes love being able to f*ck up a kitchen then go home!

Test Systems Better, IBM tells UK IT meltdown bank TSB


Re: Turning off OpenAM token validation!?

Sorry to correct you....

I believe this is to make sure YOU are not doing anything naughty like sending money for Swiss cheese to North Korea..


Zombie Cambridge Analytica told 'death' can't save it from the law



"You're a jerk Dent, a complete A**hole"...


Re: Pass out the torches and pitchforks!

Seems to me there'd be fewer extreme remedies suggested here were I to mention that Barrack Obama himself benefited from a similar Facebook privacy invasion back in 2012, which helped him get elected.

Big John, two points....

1) This is the Reg, vitriol and pitchforks are expected. Flaming torches depends on the current OPEC price on Brent Crude.

2) Unfortunately there wasn't a bandwagon to jump on in 2012.

Jokes aside, the public perceptions of security across Europe (I can't speak to for the US situation) have actually become more important to individuals over the last four - five years [1]. This means people are far more aware of their risk, and, also their responsibilities in managing their online presence. Oddly enough, Romania had most trust that the data collector would manage their personal information safely, Malta the least trust.

Given this increased awareness it is not surprising that people make more waves about data slurps.[2]

[1]Source: CORDIS EU Horizon 20:20 project framework. Secure Societies, Protecting the freedom and security of Europe and it's citizens. (Various Projects)

[2] That said another 20:20 project researches the involvement in privacy and reading of EULA's. So the propensity to complain after the fact, and with increased indignation, appears to be the norm.


Here we go again!

Regarding El Reg keeping watch.

I am hoping they dedicate the same level of dedication nay passion they

showed with the scumbags at Phorm [1]

First against the wall when the revolution comes!

He he he...


[1] Now appears to be either an artists collective or a muscle supplement :-)

Zucker for history: What I learnt about Facebook 600 years ago


Re: Mail/Express Axis of Evil

Sorry to correct but....

You forgot the obligatory Monday morning Princess Di headline...

SpaceX blasted massive plasma hole in Earth's ionosphere


El Reg Standard Handbook

Interesting read here:


Although Sheep in a Vacuum and Norris's do not seem to be in the updated edition.


Fancy a viaduct? We have a wrought Victorian iron marvel to sell you


Humm. My lunch hour gone following the truss link.

Oh er missus

I couldn't give a Greek clock about your IoT fertility tracker


Re: The Antikythera Mechanism is surely the FIRST recorded piece of Information technology!

There is a very good Nova episode on it. Including how thdy built a reproduction and worked out the number of teeth on each cog.

Well worth an hour.

EE: Data goes TITSUP* for Brit mobile customers


Actually - Stab at justification....

The morning and evening commute is my main time to catch up on my OU reading (MA in Classics if anyone is interested)

Now that they are online course materials only I download the main module to Kindle on the phone, but, they use a lot of inline links to external papers.

That's a bit of a pain...

Nice knowing the phone going straight to voicemail and not ringing isn't just me though!

Thar she blows: Strava heat map shows folk on shipwreck packed with 1,500 tonnes of bombs


Re: Spectacular

Maybe not in reality but for fiction look for James Barrington. Timebomb.

Just re-reading them whilst having a short vacation at Hotel NHS..

Tenable's response to folks upset at AWOL features: A 150-emails-a-minute spam storm


Re: Nessus?

There should be a kickback or devil take the Hindmost joke in there somewhere.


Missed it the first time..

Have a pint!


YouTuber cements head inside microwave oven


Re: Confused


I asked for that!

Seriously. We ended up looking for a couple. Eventually finding them with him in a tee shirt, and,her in a light blouse, skirt and heels...

But it's sunny they said...

Gurrr... Didn'tt mind picking up genuine problems but objected to idiots.



Re: Confused


See you Helvellyn and raise you Snowdon horseshoe, in November, in heels.

An interesting Saturday afternoon when I was in Venture Scouts and were helping the

local Mountain Rescue team.

Have a good weekend all.

Death, taxes, DXC job cuts: Three of life's sure bets





'Nuff said....

Adobe dis-Connect: Corp collab service has been knackered for days


All Open University tutorials have been cancelled for AT LEAST the next 48hrs.

Not too happy as tonight was supposed to be a 90 minute session around an MA

paper due next week.


The old system wasn't perfect but....

Sci-Fi titan Jerry Pournelle passes,
aged 84


I always hoped for another Falkenberg book. Preferably with Hal Slater too...

Ashley Madison: ‘Our site is full of women, and members are growing’



Just stop right there!

Where do I send the keyboard bill?


Bird of Prey: 1980s IT on on the small screen

Thumb Up

Re: And another????

That's the one...

I *think*

Random numbers and photo lightbox????


And another????

There was another at roughly the same time involving bank security

and the link between their London and Manchester backup centers.

Main character a computer security consultant

Can't remember the title though....

Nice scene where he's in a cafe looking for the competition

doing their pitch for a contract and being charged 50p extra

for another 1/2 teaspoon of instant coffee....

Defendant presents Playmobil rendering of court in court



@ MattW



Illinois bright spark sparks car inferno



Dave Lee Travis did something similar.

I (dimly) remember a monologue on..

"the most stupid thing I've ever done".

Something about a second hand jeep with the fuel

tank under the seat, a late night and a match....

Logo seemed appropriate!


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