Freesteel Blog » Kayak Dive

Saturday, October 15th, 2016 at 2:20 pm - - Cave, Hang-glide, Kayak Dive

Maybe I’ve got writer’s block. I’ve not even filled these into my logbook. I call it a hat-trick if I do a cave trip, a hang-glider flight and a dive in the same week. This is the fourth time I’ve done it. Generally speaking, the individual events are not all the greatest: the dive was pretty murky, the cave was gritty, and the flight was ridgy. Can’t complain.

The wreck of the Azmund is in Holyhead harbour about a mile of paddling out from the beach.

It was dark and murky and we didn’t find the way back to the boilers after starting on it. The wreck is huge though. Part of the metal juts out of water at low tide.
azmundwater

On the way back we discovered why the beach we launched from is not popular with kayakers — it dries out to about 500m. We couldn’t see our boats after the first time we walked back with a load to the car.
azmund

That was Saturday. There was a pleasant day out at Moelfre, with some people being terrified of the currents, but it was the wash from the joy-riding lifeboats that nearly sunk us. The image of the almost breaking 4 metre high wall of water that came upon us while we were anchored in the shallows of Rat Island a few minutes after they zoomed through the channel is going to live long in my memory. The second dive worked out well when we found the remains of the Royal Charter in the sand after groveling in the shallows among the kelp where it was supposed to be until giving up.

Then there was a cave trip to the far end of Ingleborough Show Cave (the only photo of which I have is a line of cavers getting changed on the footpath), followed by a quick escape home ostensibly to start clearing out the house, but which was in fact an excuse to be in North Wales for a flight off Penmaenbach.

penmanhg
I landed on the dwindling beach at high tide after an hour of very smooth sailing in the sea air.

frontroom

A concrete breaker was hired to smash up and take down the floor. We filled a skip with the crap a day later with some help from friends.

Now we live in a building site. Again. And it’s mid-way through October.

Monday, June 13th, 2016 at 2:14 pm - - Kayak Dive

I haven’t dived near Skomer since 2008 when we arrived just after Bristol University left a day early, having been drenched by the rain. This time we successfully caught them on the last day of their trip and tagged on for a dive on the north face of Tusker Rock in Jack Sound, which is known for having a very short slack window.

tusker1

We paddled out there for the dive at 1:10pm, but the Bristol boats didn’t show up from around the corner till 1:28pm — very late. Everyone blamed everyone else for the faff, and I didn’t feel confident with going in here at this crazy place alone without being really sure we got the place right. (The north flowing current is menacing as it descends down to 50m as it leaves Jack Sound.)

tusker2
Bit blurry, but there’s a dogfish swimming past Becka

tusker3
Rather too soon, we got washed off the rock by the south flowing current and had to come up.

We had an excellent extra dive in the calm waters of Martins Haven where the scallops were stacked like bricks (apparently there’s a fine of £50,000 if you’re caught taking one of them). Lots of lobsters, spider crabs, and nudibranchs. The camera was of course out of battery by then.

Next day we headed for Octopus Reef on Dinas Head, where I’d met Red Dragon Divers on a sea kayaking trip in 2012. This was a chance to tick that one off, although the visibility was very poor from the plankton bloom. Becka found the octopus on the first dive, after we’d fallen off the reef onto gravel and were swimming round in circles at 13m. Spent the night in Parrog (where we’d kayaked from), too flaked out to go to the pub.

Final day had us paddling out of Gwbert by Cardigan to Cardigan Island to try and dive the SS Hereford. Unfortunately, the westerly swell was picking up quite a bit, so the sea was a little crazy out there and not a great place to try a dive on a shallow wreck. So we dropped in round the corner in the sheltered waters that was very much in its pea soup stage of plankton (little green translucent peas of algae everywhere), bothered a few lobsters, dogfish and spider crabs, before paddling onwards to Mwnt visiting all the sea caves in the coast. The carry-out was not as bad as it looks in the photo.
mwnt

Becka left me at the tea shop while she walked back to fetch the car. The lady running it explained that the dolphins can normally be found off the north end of the beach, whenever you see a gannet flying there. She guessed they were driving the fish into a sand-bar, and the gannet was picking the ones off that came to the surface.

We can check it out next time we go down there and have a third attempt to do the Hereford wreck when we are sure the sea state is calm enough to make it worthwhile. Kayak diving wins again.

Wednesday, March 23rd, 2016 at 11:19 am - - Kayak Dive

I really have been neglecting to blog. I’m going to bang out a few quick posts on this the day before my holiday.

Saturday 12 March involved a grumpy day paddling around Hilbre Island with a rather fuzzy camera.

This is the stone wall on the northwest corner of the island at high water:

The professor on the water had just gone on a 10 day trip to Japan to use up an academic travel budget, and at the same time busted a chunk out of the dwindling global carbon budget [podcast here]. You don’t want to see what the bailiffs do when they collect on an unpaid carbon debt. They’ll take your food.

I’ve been speculating about a specialization of my Question from Hell proposal where visiting professors who have just flown to give a lecture get routinely asked about their carbon budget (which they could have avoided by teleconferencing) as the first audience question from a young student. It will be rude and ungrateful to ask such questions of a visiting guest, and will embarrass everybody. The excuses are lame.

The top excuse will be: “We don’t have the equipment”.

If that one gets a lot of laughter, the second excuse will be: “Meeting in person makes a big difference”. To which I’d like to respond: “Where’s the research?”

There isn’t any.

I’d love to set up a controlled experiment where the person who doesn’t do the 10 day trip to Japan gets to take a 24 hour bus ride to a hotel opposite a Japanese takeaway in Dundee via Plymouth and is locked-in with the internet where his only communications portal for the next 120 hours is a telepresence robot parked in the corner of the lab in Japan. He is free to rove the corridors if he’s being ignored. Maybe one of the brighter students would take pity on the robot and take it home overnight for late night chat with bottle of sake, or even for a night tour round the city on a motorbike. I hear these VR goggles and hi-def cameras are pretty good these days.

The time duration exposure, the portability, and the lessening of inhibitions could easily mean that human bonds and interaction could be much enhanced compared to proceeding to these places as a meat embodiment that smells and needs to go to the toilet occasionally.

If this Questioning takes off I am expecting that university administrators, who can be blindingly stupid, commit to ban such questions, as you cannot ban something like this without actually telling people what it is you are banning.

PS. Cory Doctorow was burning up the planet ten years ago.

Monday, October 5th, 2015 at 7:18 pm - - Kayak Dive

Not much bloggable recently. Some well-formed untested ideas on matters of servo motor control, and lots of bad psychology. Two discoveries of note that’ll take up a lot of time are jscut for CAM and chilipeppr for CNC downloads, both of which run in the browser. I have an interest in this approach, but now that I’ve found some people who are doing it effectively, it will save me a lot of time.

Meantime, here’s a couple of bad pictures from a cheeky kayak dive in the docks during Becka’s Thursday night canoe polo session (aka murderball).

Getting ready to go down:
eel1

One of the scary eels that made me shriek when it appeared in the dark.
eel2

Eels look and move a lot like snakes. We’ve got an instinctive fear when we encounter them in their own environment. It was interesting how they could swim backwards just as easily as forwards.

Monday, September 7th, 2015 at 10:55 am - - Kayak Dive

Home at last. Lots of stuff to do, so here’s just the bare facts of the trip to the north part of Ireland with our kayaks, as well as a 4-day booking with aquaholics where the weather blew northerly gales the whole time, which denied access to the famous north face of Rathlin Island and the basking sharks were a no-show.

Date Site Place type depth (m) time (mins)
2015-08-28 Mulroy Bay Downings Kayak 15 19
2015-08-28 Mulroy Bay Downings Kayak 17 35
2015-08-29 Melmore Head Downings Kayak 20 45
2015-08-30 Gloster Rock Malin Beg Kayak 20 12
2015-08-30 Shark Rock Malin Beg Kayak 20 30
2015-08-31 2nd Pinnacle Slieve League Kayak 18 12
2015-08-31 Big Cave Slieve League Kayak 9 15
2015-08-31 Carrigan Head Slieve League Kayak 20 23
2015-09-01 Portnagh Rock St Johns Point Shore 26 52
2015-09-01 Skuddagh Rock St Johns Point Shore 17 48
2015-09-02 Black rocks Rahlin Island Boat 31 36
2015-09-02 HMS Drake Rahlin Island Boat 18 46
2015-09-03 Black rocks Rahlin Island Boat 31 38
2015-09-03 Scallop bed Rahlin Island Boat 21 48
2015-09-04 SS Lough Garry Rahlin Island Boat 30 29
2015-09-04 Harbour wreck Ballycastle Boat 19 37
2015-09-05 SS Lough Garry Rahlin Island Boat 29 29
2015-09-05 Black rocks Rahlin Island Boat 29 36
2015-09-06 Lees Inner Wreck Strangford Lough Kayak 11 24
2015-09-06 Lees Outer Wreck Strangford Lough Kayak 12 29

Kayak diving wins again!

The most notable sighting of wildlife was this unexplained swimming snail above the kelp at the start of yet another black rocks dive (where we failed to find the right bit as usual).

Wednesday, September 2nd, 2015 at 9:17 pm - - Kayak Dive

The past five days have been kayak diving and camping in Donegal. Now we’re in Ballycastle for four more days of expensive boat diving where the weather has turned bad and probably won’t be so good underwater, but at least we’ve got a roof over our heads.

Camping in Ireland seems pretty easy. The two places we’ve stayed at had “day rooms” for people with tents where you can do your cooking, make toast, sit down and drink tea.

First two days were at Downings, diving in the almost totally enclosed Broadwater Bay at Massmount, and then at the totally exposed Melmore Head once we’d got our confidence back.

Then it was south to pitch tent at Derrylahan hostel before spending the day out at Malin Beg having to seal launch the kayaks off the slip at very low tide and poking our noses along the Slieve League cliffs for a couple of kilometres to check if paddling its full length was going to be a silly plan. The local fishermen thought it was an okay idea and said there weren’t any currents. With a northerly wind blowing we had perfect shelter.

Here’s a short video of a dive into a shoal of mackerel at the mouth of a huge cave. I noticed them only because they broke the surface as the streamed past my canoe and it looked like rain was falling onto the water even though the cavern ceiling was dry.

The next dive onwards was on the east side at exactly the tip of Carrigan Head, completely sheltered from the wind, waves and current by a 2 metre high headland of rock, but where the sounder registered a sudden dropoff to 20metres. The place was scoured of kelp revealing a low animal turf and dozens of large wrasse fish parked in the slot doing nothing in particular. As usual, Becka did the cycle back along the road to fetch the car while I packed the gear and walked up the road to the hostel to have a cup of tea.

On our fifth day in Ireland we got air fills at Dive Donegal before using it all up on two long short dives from St Johns Point. If anyone is counting, the one on the left out from Portnagh Rock should be in the top ten shore dives of the world for its perfectly designed architecture of satisfaction. You use up your air at the perfect rate at the perfect depth and everything is easy to find. The karst rock of the main reef has eroded into shelves that are like a condominium hotel for critters (one alcove contained a fat lobster chewing on the hide of a dead dogfish). It’s worth the drive, even if we couldn’t find a decent breakfast anywhere nearby to fill us up in the morning.

All this kayaking is exhausting and makes me not interested in spending many hours at the computer. I’ve got all winter to do this when I get home and settled down.

Monday, August 10th, 2015 at 3:14 pm - - Kayak Dive

What do you do with someone who broke their elbow six weeks ago?

Take them on a long 7 hour canoing trip up the Conwy river from the coast at Deganwy to the new inland surf station at the historic village of Dolgarrog, of course.

conwymap

Due to the lack of a waterproof camera, I don’t have any photos of our journey and of the many hours upwind paddling through miles of waving reed meadows and into the small dry creek leading to the hydro power station.

We parked on a bank full of thistles and waded through stagnant pools and along rocky river beds before we reached a road bridge where we could climb up and over the fence.

nwsurf
Down that road was the surf pond, already packed out on its 6th day of operation. We had our picnic on a bench watching the surfers, noted that it was already half past six, and then rushed back to the boats before we got benighted.

deganwy
In the meantime the hydro power gates had opened, causing a slightly worrying river crossing. The tide had also risen another metre (more than an hour after Conwy high tide at 5pm) nearly washing our boats away.

More engineering

Last Thursday I made a trip to the Advanced Manufacturing Research Centre in Sheffield. It’s a bit of a massive establishment with a lot of machine tools, so they ought to have people making special CNC toolpaths for them. On the other hand, I don’t think the development of yet more passenger aircraft technology is necessarily a good investment of engineering resources, given that the industry needs to shrink by 10% per year from now on as part of any strategy for us to survive on this planet with our species and civilization intact.

I decided I need some mechanical engineers to put to work on the triangular machine tool, and formed a theory that there were not enough of them around because they’d all got a proper formal education which put them on the conveyor belt into corporate employment where they were no longer an accessible resource. On the other hand, software engineers are often self-taught and therefore don’t begin their careers with much faith in the system, and so tended to be easier to entice into random start-ups that don’t have any rich person’s backing.

manchmf
Then I spent most of my Sunday in Manchester at the MakeFest in MOSI not helping on the DoESLiverpool stand at all. But I did find plenty of mechanical engineers who immediately contradicted my theories.

One of them had made a tiny wind tunnel model into which he let me insert my hang-glider wind meter for testing, which I’ll talk about in the next post rather than confuse everyone by putting at the bottom of this page here.

Friday, June 26th, 2015 at 12:59 pm - - Kayak Dive

I took a break from my treadmill of unpaid unproductive work for a day on Cosmo’s boat with a couple of dives with Becka. We left the slip at 7am, having forgotten to have my morning tea. I wondered if my addiction was the cause of the headache most of the afternoon.

beckaoverboard
Aside from that, it was very calm out there.

We dived on the wreck of the Alarm (a light ship), which was pretty deep at 30metres, but clear enough to see and swim round.


There was a bit of a drama with the SMB reel which stops paying out if you squeeze the trigger too hard, doesn’t it?

beckawet beckapressuretest

Becka’s suit flooded completely. Luckily the water was 12degreesC, so it was like being in a cave. We pressure-tested it after the second dive with soapy water and only just detected the problem on the neck seal which had peeled off at the front and remained joined by a thick film of glue.

The second dive was on the Lelia in stirred up clouds of terrible visibility. (Here is a video from last time when it was clearer, which was also the last time I bothered taking a still-shot camera underwater.) Headcam video does the necessary job of aiding my memories.

We got off the wreck as soon as we’d dealt with the anchor, not wanting any repeat of our getting trapped inside experience from our last trip out (which, fortunately, was not our last and final trip).

Sunday, April 5th, 2015 at 7:26 pm - - Kayak Dive, Whipping

I’ve washed up on the annual Easter university diving trip, though my heart’s not in it. There’s a long period of stable weather forecasted, which should mean the silt will have time to settle out of the water ready for when the novices to get good enough to come out to more exciting locations.

sennendive
snakelocks anemone encrusted wreckage in Sennen Cove

It’s a bit of a rehash: I’ve done them all before in previous years in better conditions, with Becka by kayak back in 2010. I’m too tired at the end of the day to do any of the hacking I’d hoped for, so I’m marking time. Maybe I should go to the pub more often and not try to make best use of my time all the time.

Curiously, that last time in Cornwall (but one) also coincided with a General Election campaign, and I remember a big Conservative Party poster in a farmer’s field at the end of the lane. There isn’t one there this year. Either the land-owner is not so keen on Cameron this time, or he can’t be bothered, or he’s sold up to a new owner, or who knows? It’s another metric that could have been noted and cross-correlated over the years if we really had the data. For the life of me, I don’t know why these posters never became a substrate for some time-limited concentrated geocaching game. Geocaching happens on a lot sillier things, and this could have been like tracking down sightings of rare wild animals.

fishinweeds
Fish approach between the boulders and kelp

Meanwhile, the serious programmers are making hay with the ElectionLeaflets.org site and Parliamentary candidates CVs.

Watching them discuss stuff I realize I’m totally lost in the last century in terms of the technology. It’s a full time job just keeping up. (And in the large software company I briefly worked for, nobody seemed to be employed to keep up, so they didn’t.) Nowadays I don’t know much more than the difference between JPEGs and PNGs.

Other projects are pinging up around the net, such as VoteForPolicies.org where they blogged their technical case study like so:

We are using the RabbitMQ messaging system, our queue server is run by CloudAMPQ (Big Bunny instance, dedicated server)…

Our worker servers also live behind an ELB but don’t have auto-scaling enabled; we manually manage the amount of instances based on the size of our queues, we can check using the RabbitMQ management console…

All of our MySQL queries are handled by the Doctrine ORM and written using the Doctrine QueryBuilder. These doctrine queries are also cached in Redis as SQL…

Our application is based on Symfony 2.6.* standard edition.

For Redis we use the SncRedisBundle. For RabbitMQ interactions we are using the RabbitMqBundle.

We’re using the DoctrineMigrationsBundle for database migrations and the data-fixtures and AliceBundle for database fixtures.

Our CI tool Jenkins runs all of our tests and triggers a new capistrano deployment if they pass.

Is it me, or does it feel like I’m in the world of The Hitchhiker’s Guide to the Galaxy reading about how to build a Globular Cluster Information Hyperdrive?

And this, all in the name of electing Members of Parliament, an institution whose daily procedures were already antiquated back in the Victorian era.

Once the process of governance starts getting anywhere near state of the art web technology, it’s going to be awesome.

Or it will be a whole lot worse. You never know.

As the human debacle around the science of climate change has proved, this tech is equally good at spreading knowledge and intelligence or ignorance and stupidity. It’s our choice as to what we want from it.

Sunday, December 7th, 2014 at 4:14 pm - - Cave, Kayak Dive, Machining

I’m going to do some other coding, now that I got this result. The code would fall apart if I touched it again.
impslicesubdiv

Next on the list of things to do is clear out the vast quantity of rubbish left in the code, completely redo the subdivision loops and make the logic robust, apply it to multiple z-levels and plot slices, then make it test against edges and faces (not just points), and package it into a self-contained (but very slow) version of the slicer.

I don’t know how long this will take, as there are many other distractions available.
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