Jun 17, 2015

Port Mellon

Dive Against Debris UK Volunteers

Port Mellon was an interesting and exciting dive, exciting as it was my first dive this year and hence the lack of blog posts which I can only apologise for but personal life got in the way, and interesting as it was with Dive Against Debris UK Volunteers and Project AWARE through Kernow Divers. As always in Cornwall it was a beautiful spot, a small village South of Mevagissey with a fairly large shallow harbour at about 8-9m at high tide as you swim out. I didn’t get to explore the village and am sure it had more to it but an easy access car park, an easy access dive spot and a pub with decent ale and hot food is enough for me, next time will try the food but what they brought out for some of the guests looked worth a try. Can see it being busy later in the summer as it is within walking distance of Mevagissey and the narrow lanes through Meva are a nightmare out of season without tourists.

Port Mellon

While I was nervous being my first dive of the year it was great to have so many Kernow Divers club members there who I had dived with before, and being budded up with Rob of Dive Against Debris UK Volunteers was awesome as I am sure he is on the same wavelength as me about the environment and our role in it, I keep meaning to invite him out for a beer one evening. There was a lot of organising to do and when everyone got in the water and headed off on the left side of the harbour, I jumped in gingerly and set about sorting my camera out so it was one less thing to worry about as I went through setting my buoyancy and checking my regs and waiting for rob, it was only about 2m off the slipway but it felt great being back in the water and ready to go.

Rob

When I had finished faffing around I noticed that the area around the slipway was strangely clear of any debris, in fact in the first few minutes, unlike other dive spots, the only thing I saw man made was this strange brick with an engraving on it.

_6143720

Then as Rob, the girls and I were bimbling along, with no sign of any rubbish anywhere I saw my first fish and it was this big (                                                            ) honest.

First fish in months

I know it isn’t a very good shot (but it was my first fish in ages so while I am stoked about seeing it, you all have to suffer) and that there seems to be an issue with fogging in my wet lens, it hasn’t been touched in such a long time I am unsure if the seal is OK in it, but have found out in that time that while it was a cheap second hand lens, it isn’t serviceable as such, shame on Epoque and a good reason to look elsewhere when I get the chance to buy another.

As all you divers know each time we get in the water it is such a buzz, and a privilege to explore the environment we love so much, and I am still buzzing now, in fact the only thing stopping me diving again is having to wait to get my tank filled, but it was worth it. As we bimbled along the reef there were so many nooks to look in but for some reason the first 20 mins of the dive was barren of very much but Seaweed and other rock clingy life forms (yes that is now a technical term), and there was no rubbish, it was almost as if the mermaids had come in and picked the place clean before we got there, does Cornwall Council employ mermaids to litter pick at the dead of night??

Saying that, Rob did manage to find a submarine periscope, that is his story and he is sticking to it.

marine litter

As with any diver I just needed confidence in my kit and the skills I had learned, over the previous 6 months I had been practicing my breathing, mentally running through the various skills we learn as students and getting more nervous as each day had gone by and I hadn’t dived, yet nerves are a good thing, so is mentally practicing the skills we use as we get wet. I have meditated for years, breathing through my diaphragm instead of upper chest but didn’t think about putting the 2 together till I saw a video that explained the importance of breathing and conserving air while breathing, non divers won’t really get that, but I was expecting a 40-45 min dive max and was pleasantly surprised for Rob to tell me we had a 63 minute dive. If I had worn my 7mm beaver semi I would have been warmer at the end of the dive and wish I had, I still had 150 bar left when we encountered what I first thought was a plastic bag floating near the surface, so being the first piece of rubbish I saw, made a bee-line for it only to find it wasn’t a plastic bag but..

Barrel Jellyfish 1

_6143759

_6143746

A Barrel Jellyfish (Rhizostoma pulmo), having seen them on other peoples photos, and being jealous that I hadn’t been diving that day, it was the first I had seen. It moved through the water with such grace, I am 6ft and it was about the top of my head to my knees long, it wasn’t scary though as I knew they didn’t really sting you like others, it was a privilege to finally see one close up, but that is then where my air consumption went out of the window, after swimming around it a couple of times to get as many shots as I could, like you do, I noticed in that few minutes I had used 40 bar, so back to the reef for a few minutes with Rob to keep looking for the elusive litter and then it would be time to head back.

As we were looking up one of the gullies, Rob pointed out a Dog Fish (Scyliorhinus canicula) laying peacefully on the bottom and I approached carefully to photograph it, but it still decided I was a threat and moved, I was careful to follow it at a distance, watching behind me to keep an eye on where Rob was and he was OK.

_6143774

_6143779

If you look carefully at the photos you can see how there is no visible debris like a lot of other UK, and Cornish dive sites and it was great to see, but obviously the smaller particulate pieces of plastic and debris would still be diffused within the water column, the great thing about a lack of debris was that the rock clinging Kelp had not been disturbed and I saw this beautiful scene as I looked up on my exit from the gully with the dogfish.

_6143763

There was a lot of life around though, someone else in the group got a photo of a blennie, I also saw a wrasse (I think, we call most fish we can’t identify Wrasse here lol) that was huge

 Wrasse

and lots of smaller Jellyfish, fish and more, it is just one of those places you would have to explore yourself to see, especially with the few sea grass clumps we saw, it would make for an interesting exploration dive of the whole harbour area, especially out to the right of the harbour where there is a rock outcrop that looks to go a hundred or so metres out to sea.

_6143771

_6143769

We all had an enjoyable dive but it was the biggest fail as a Dive Against debris goes, but a pleasant one at Port Mellon, Rachel said the litter was only about 1.7kg, a massive drop on what has been collected elsewhere. A look into the currents outside of the harbour would probably show that it is just in that sweet spot protected from currents with the headland further South, and why Mevagissey gets caught with more rubbish that extra half mile or so North as the circulatory currents sweep back inland.

2015-06-14_port_mellon_litter

So for my first dive after a bit of a break I am grateful to Colin, Keith and Ollie of Kernow divers for your support and encouragement to just get back in, Charlie for her gorgeous brownies, and to Rob and Rachel for organising yet another beautiful and meaningful dive with Dive Against Debris UK Volunteers at Port Mellon, and The Rising Sun for such great beer for after.

_6143796

Jan 27, 2015

Titanic and Beyond— A Million Shipwrecks Still Lay Beneath

By Guest Author Michael Bernzweig

Udnerwater metal detectorist

In 1985, the world marveled when news spread that the sunken Titanic was discovered on the ocean floor. Until then, underwater exploration was nothing more than a pipe dream. Fast forward to 1989 in the Atlantic—the German battleship Bismarck was discovered by the same man! Who is this brilliant oceanographer? None other than Dr. Robert Ballard, a native of San Diego, CA, former United States Navy officer and professor of oceanography. Ballard catapulted to fame with the discovery of these two shipwrecks, and people wanted to know how it was possible to search uncharted territory under the sea.

Extreme Detectorist—Dr. Robert Ballard

If you ask Robert Ballard, he will tell you he was born with a passion for studying the sea. He soaked up everything he could learn about oceanography in college and graduate school. Then, Ballard put his scientific skills to use as an officer in the U.S. Navy. This is where he gained access to one of the first manned submersibles. Consequently, Ballard was inspired to develop his own advanced deep-diving submersibles. Among them, the Argo was an unmanned deep-towed undersea video camera.  The Argo had several cameras looking forward and down, as well as strobes and underwater lighting to illuminate the ocean floor. Thanks to visionaries like Robert Ballard, remote operated vehicles (ROVs) are so advanced today—they are used to locate sunken ships and aircraft—such as Malaysian Flight MH370. Ballard and his team of deep-sea explorers have located and examined dozens of noteworthy wrecks. They have also made scientific discoveries under the sea, (i.e. hydrothermal vents over the Mid-Atlantic Ridge).

shipwreck with divers

Tremendous Impact on Underwater Search

For extreme detectorists, what makes Robert Ballard such an important figure is his role in the development of underwater ROVs. The inception and technological advances made to ROVs make locating shipwrecks entirely possible today. They are also now available for personal use or for small salvage teams. ROVs were originally created for use by the Navy—not for locating underwater treasure. After Robert Ballard located the Titanic and Bismarck, only large commercial salvage operations could afford such a huge investment. Now, a mainstream, yet avid, underwater detectorist can actually get his hands on marine salvage equipment.  Equipment available today includes -held and boat-towed metal detectors, marine magnetometers, underwater camera systems, Pingers and Receivers, ROVs, and side scan sonar. This is how dreams become reality!

 

Estimated Number of Lost Shipwrecks and Total Value

Obviously, the number of shipwrecks yet to be discovered is only an estimate—many are uncharted and based on legend. One expert oceanographer, James Delgado of the National Oceanic and Atmospheric Administration (NOAA), gives his best guess as approximately one million shipwrecks [still underwater]. Delgado points out, “Seventy percent of the planet’s surface is water, and humans have only begun to reach the depths. That means 95 percent of the ocean still remains unknown to us. It’s the last frontier.”
According to Sean Fisher, of Mel Fisher’s Treasures in Key West, the value of undiscovered shipwrecks and their cargoes can be estimated at somewhere around $60 billion. This figure is based on historical research. Sean Fisher is the grandson of Mel Fisher, famous American shipwreck hunter who discovered the Spanish galleon Nuestra Señora de Atocha. Sean Fisher says, “Several wrecks out there are worth several billion dollars each.” Spanish vessels kept records in triplicate, which allows shipwreck hunters to see the preserved ship manifests. These manifests document an incredible amount of wealth crossing the ocean centuries ago.

Shipwreck Salvage and Maritime Laws

Although there is a significant amount of unrecovered shipwreck treasure, there are laws and jurisdiction which dictate its ownership. Global laws are emerging that concern archaeological and/or historically valuable finds. So, even if you are lucky enough to locate a shipwreck, the cargo may be sovereign property of its origin country. This scenario played out recently when American treasure hunters recovered $500 million in silver and gold coins that went down with a Spanish warship. The Spanish government won legal rights to the loot, with zero compensation to the treasure hunters. State and international maritime laws are not uniform; therefore, it is the responsibility of the detectorist to research laws of ownership prior to any recovery effort. In many cases, the salvors are entitled to the full value of their finds. Because of legal complexities, it is often a good idea to join a dive club if you are serious about shipwreck diving.

Equipment Needed for Shipwreck Discovery and Salvage

After the salvor or salvage team has carefully researched and mapped out a location, underwater detection devices are used to map the seafloor and search for wreckage. Underwater equipment typically includes boat-towed metal detectors, magnetometers, ROVs, lighting and camera/video devices, pingers and receivers; and hand-held underwater metal detectors.
Boat-towed metal detectors are usually the first devices used for locating a shipwreck. They are built with long cables that are dropped from a search vessel; they will signal metal targets along a wide search area. Boat-towed metal detectors are searching for a ‘debris field,’ which can consist of cannons, anchors, propellers, a ship hull or other signs of wreckage. Underwater metal detectors are equipped with magnetometers or side-scan sonar. Magnetometers are the most powerful boat-towed metal detectors for iron and steel. They compare the intensity and direction of one magnetic field to another.
Side scan sonar creates a map of the sea floor using echoes. The echoes translate into a picture—which is made up of dark and light areas. Studying these images, scientists can create accurate maps. Images of unnatural shapes such as straight edges or perfect circles require closer inspection with remote-operated vehicles and cameras. A remotely operated vehicle (ROV) is an unmanned underwater robot that transmits signals between an operator on the ship and the unit. The vehicle is navigated from the ship, but operates alone as it can travel to depths that are unsafe for humans. Typically, ROVs include a video camera, lights and sonar systems. Some are outfitted with an articulating arm that can retrieve small objects and attach lifting hooks to larger objects so they can be raised. Take the time to read more detailed information about necessary equipment for locating a shipwreck.

Reference:

Popular Mechanics.com- What’s the Total Value of the World’s Sunken Treasure?

Biography

About the author: Daniel Bernzweig manages MetalDetector.com in Southborough, MA. He has written on the subject of treasure hunting and metal detecting since the mid 1980’s. He enjoys traveling with his metal detector and helping to educate others in the correct use of metal detectors in their explorations.

 

Orcalight Seawolf Lights.

About 8 or 9 months ago I read about a new light on the market, the Orcalight Seawolf 2260; I commented on the article about the price and how it was a shame it wasn’t for the recreational market, Shane Newman (the MD of Orcalight) and I started chatting again more recently and he has taken a lot on-board from the diving community. The light was originally developed for the professional film and documentary underwater videographer market, and at just over £2300 (inclusive of VAT) made it something that is an investment for them. With an engineer behind the design and British production of the LED, housing, batteries and lenses it is understandable at the high price for a limited market The great news is that they have just released a new version with less power but still the great build quality and service that comes in buying the top end 2260; the Orcalight Seawolf 660 is aimed at the recreational market with more improvements to the range on the way.

Orcalight Seawolf 2260 @14,000

Shane and the guys and gals at Orcalight developed a new type of LED, driver and firmware for another project, yet it sat on the proverbial shelf for quite a while till a guy called Doug Anderson, who just happened to want a decent light for video work underwater, approached Shane to design it for him. Doug is a serious underwater videographer with documentary series’ such as Life for the BBC in his portfolio. While I was chatting to Shane he told me about the first time Doug took it in the water and what his reaction was when he came to Shane with feedback, if I recall correctly it went something like:

Doug: ‘Do you know what you have done?

Shane: ‘Oh god has it failed or something, is it no good?’

Doug: ‘Not any good, are you joking? This is more than good and is going to revolutionise film and photographic work underwater’

So if it impressed a professional who makes a living from filming the things we have the privilege to see when we go diving, taking pictures or video with lights and strobes from their many well placed competitors to share with our friends and relatives, it is going to blow you away, as it did me.

orcalight_peli_case

I was loaned the demo lights (which I will get onto shortly) to try them out, I had to go and meet Josie, the young lady in Plymouth who is one of the people working with Shane to help promote and develop the lights, as it was getting dark we met in a secret location (a supermarket car park), we joked about how it was like the most awesome spy mission ever, collecting a large Peli case without drawing attention to ourselves and when I got them home I was gobsmacked by how good they are. As a recreational diver it was a privilege to be loaned something so expensive to try out, as I was loaned the Orcalight Seawolf 2260 and 1560 as Shane hasn’t got a 660 for loan just yet, the idea being that I used the second setting on both lights, that way the 1560 would give off 10,000 lumens, the 2260 14,000 lumens and it would give an idea of the 660 at 12,000 lumens, I clearly had the intention of doing that, and playing with the higher setting while diving, just to see, because it was there and I could.

Orcalight 2260 in the box

orcalight_2260_whats_in_the_box

Orcalight 1560

orcalight_1560

What comes in the box:

When you buy your light, depending on which model, and which bundle you go for, you get between 1 and 6 batteries, 1 or 2 lenses of the 60,90 and 120 degree choice, and the light unit, or lamp head and canister. If you  go for the 2260 it comes in a Peli case with plenty of spare room for another 3 batteries (with 3 in the unit), all 3 lenses, the charger and the allen key to take it apart in the field. I am pretty sure there will be other things in the box, like the warranty paperwork, manual and the like in a new one but we work with what we see, and if you are lucky enough to be able to afford it all, there are tripods, umbilicals and surface power packs/generation for the serious enthusiast and professional underwater videographer or company. The basic package for the 660 comes with a lens of your choice from the 3, a battery and charger and is ready to go out of the box.

Orcalight Seawolf Build Quality

So down to the important part of the investment anyone that purchases one of these lights needs to know. and why they are worth every penny whichever model you purchase (can you tell I like them).

The housings are made of 6082 Aluminium, 316 Stainless, or Titanium on request, and coated in a 70 micron thick anodised coating followed by a PTFE coating that takes a fair knock, they are completely modular throughout the range, if you wanted you could in principle have the 660 lamp head in the 2260 canister set up but this would obviously cost a little more than the great price of the 660. The whole thing is modular in its design, sure there may be 2 versions, but as they are fully serviceable in the field (a requirement of the professional videographers) the design behind them is simplicity in itself.

Orcalight 1560 rail mounting system

orcalight_mounting_rail_build_quality

The lenses, which currently there are 3 of, 60°, 90° and 120°, are made of a very high quality spec optical resin with a precise refractive index and with the LED producing a finely balanced 118 lumens per watt of power from the battery (or batteries depending on which model you purchase) which are programmed for individual lights, so the time of construction in the UK by the team at Orcalight is a minimum of 3 days just in programming and testing to “tune” the driver to the LED and batteries which are also matched precisely to each other in sets.

Orcalight 2260 light unit

orcalight_2260_led

Orcalight 1560 light unit

orcalight_1560_led

The batteries that Shane and the Orcalight team decided to use are the highest quality they could find, after approaching Sony and Panasonic the ones they chose have proven their worth as after 1 year of use in the demo lights and over 300 charge and discharge cycles, they still show they can take full charge unlike other batteries that loose the ability to hold that level of charge. The built in safety for the lights is second to none as well, after 70 minutes they drop to the first power level, and provide an emergency back up for a further 30+mins giving a diver plenty of time to safely reach the surface from a cave system, wreck or depth with only a small back up torch that might be used at the end of the ascent.

I only took the back of the lights off to take the batteries out to charge, this has been changed on version 3 by the inclusion of a charging port on the rear of all the units, this also doubles as a gas release if there is any ingress of water, because the way the guys have designed the units allows for a small amount to enter if it can, and keeping the batteries separate inside (with solid connectors for each battery) as they have, means if one gets wet and gives off gases the others may not,  if it is not shaken around violently when in use. They are so well fitting that they are actually hard to prise apart, but the double o-rings on each end keep any flooding to a minimum, even the optics on the front forgive a leak from incorrect placement or a worn o ring; a simple rinse with clean water dry and re-use; it comes down to looking after your light as you would the rest of your kit and it will last for years.

Very carefully I had to use the back of a table knife to start prising them apart (the new units now have push off pull on locking clasps), once they had moved less than a mm all round I was happy to start the task of pulling and gently rocking the end cap till it came off, it was actually a pleasing task as many lights of competitors I have seen are a lot less sturdy in contact and sealing, and while as divers we take every care to make sure even the smallest of hairs are not on the o rings the lesser lights can and do still flood. As I looked in the end of the canister (apologies but didn’t take pics) the craftsmanship showed through, the batteries could only go in one way and they slid out easily, the large connectors came apart easily, and went back together easily to allow them to be charged out of the unit. Josie advised me to charge the batteries for 3 hours, and while that is what I did, it did take a while with 4 batteries to charge which did seem like a pretty major issue for a recreational diver, yet these weren’t originally designed for that kind of use. The later models with the charging port have overcome having to charge the batteries separately, and with the knowledge Shane has am sure there shouldn’t be an issue of overheating the batteries while charging and damaging them like cheaper quick chargers do.

Orcalight 2260 rear plate, older version.

orcalight_switch

Orcalight 1560 rear plate.

orcalight_1560_rear_plate

They have been rated at 150m depth for use, but that isn’t their limitation, they have been used at 400m by one customer for 1 1/2 hours (bottom time) on their ROV without any issues and worked perfectly (and still do). Each unit is tested in house to 200m before it is sent out.

This is the bit I find most interesting, the modular design of the system means that anything that is developed in the future for one of the lights, will fit any that have been made before and even more amazing than that is the fact they can be retro fitted to produce any specific wavelength from UV to IR. I know this is a lot to take in but on top of that is the customer service, Shane didn’t mention if you would get charged for user error but his attitude to customers is an old fashioned one, they come first and anything they can do, be it on the phone if you are in the field, or if you send it back for repair, they will make sure the unit is working again. From talking to him for a few hours over many nights, Shane is one of those guys who will stand by his word, and his word as far as the Orcalight range goes is that you are purchasing a light for life.

Orcalight 1560 light head and cooling vents

orcalight_led_light_cooling

While the purchases (due to cost and the professional market they were being aimed at) have been sparse over the last 9 months, they have sold 70 units of the various versions and have only had 2 returns, both from user error and that says a lot for the quality of the product and why it is a purchase that should (and most probably will) last each customer a lifetime. The estimate on the LED is over 10 years of continued use and the batteries at least over 300 cycles without any degradation, and when Shane finally kills the batteries in the demo models being used in the field, he will have the full lifetime of them well ahead of any customer.

 

 

What the Orcalight Seawolf lights look like out of the water when you turn them on.

Now I have to remind you that I was trying them to see what 12,000 lumens from the 660 for 50 minutes would be like for the recreational diver, and I am so gutted the timing of being loaned them coincided with a strange weather pattern for a few days where it was pretty windy most days, very wet and the vis was getting worse by the day. I was so excited the day I got them home that I made a short video (and here my lack of knowledge of planning and skills with a camera show, but I would do so many things differently if I had them again, a tripod for the camera for one), when I tried them in the car park at night this is what I saw and I have placed the video together in this way so you can see the 10,000 and 14,000 settings to get an idea of the power of the 660 at 12,000 lumens at full power.

Orcalight Seawolf 2260 1560 dry test comparison from Diving Junkie on Vimeo.

 

The Dive.

I was going to write a separate blog entry about the dive but as we had to bail on it due to the conditions thought I would add it here in brief.

orcalight_seawolf_dive_test_01

Had arranged with Kurt to do a late evening dive, we had chosen the Headland at Newquay to go in off the NE side; our plans soon changed when we got there as it looked mirror like flat on the SW edge at little Fistral with an easier entry down the steps and over the beach at that time of night. After a couple of successful dives before with similair conditions what happened was quite a shock, the seabed off little Fistral starts as sand and pebbles but quickly changes to boulders and a varying range of, sand, smaller boulders and granite bedrock that create gullies below the water line. It was nice and flat above, but this was not the case underneath; if we had surface swam it would have been a different story, we didn’t as we were too excited to get under and try out the lights and after tiring us out, pretty much left us with unusable dive footage and photos from either myself or Kurt by the time we had got very far through the surges from the gullies, a mistake I won’t be making again as it is a dive site rarely used due to heavier sea conditions on that side and why Fistral beach is world renowned for surfing .

I am going to put a few of the pictures here though to show the lighting and colours, and I really wish I had better quality images so apologies for them in advance, if I ever get the chance to have the lights on loan again this is one of the other things I would do differently, but the camera was on auto (but ISO fixed at 200) when I entered the water and when we were out I was going to change the settings to various others to try it out, but as I have already mentioned we didn’t get the chance. These were taken when we were deciding if we should surface to head back, there was no flash, these are unadjusted but compressed for web, and I was carrying the 2260 and had it on setting 2 at 14,000 lumens. The camera I was using was my Olympus PEN E-PM1 in the E-PT06L housing and Epoque DCL 30 wide angle wet lens.

In the raw file the settings were ISO200; f18 1/25sec

orcalight_seawolf_dive_test_02

In the raw file the settings were ISO200 f18 1/8sec

orcalight_seawolf_dive_test_03

In the raw file the settings were ISO200 f18 1/3sec

orcalight_seawolf_dive_test_04

I hope the images show that if I had been in a better position with no surge and been able to have manual control over the camera they would have been exceptional (I can dream) photos, but the colours speak for themselves, as well as the lighting clearly showing that on a night dive, in pitch black, it brought out the natural colours beyond expectations. I can not apologise enough for the poor camera skills, and unlucky choice of pics to show you as well as the inexperience of diving a site and not taking into account surges that ruined what was a great opportunity to try something special.

After being tired out by the conditions we had a cuppa and stroll up the headland, for such a clear and warm night it was empty of people, would be a great place for watching the stars.

Kurt

orcalight_seawolf_dive_test_05

Other videos testing the Orcalight Seawolf 2260

I have kindly been given permission to put some videos (also on vimeo) from some of the more serious, and professional videographers that have used the Orcalight Seawolf 2260 at full power so you could see what they are like underwater, there are a few more available on the internet but I asked to put these up because they show how good they are, as you will see

Rafa Herrero Massieu of Aquawork

Shot on a RED Epic at 5k with 2 Orcalight 2260’s

A001 C033 0627YV slow25 from AQUAWORK on Vimeo.

Isla Azul

Shot on a RED Epic at 5k with 2 Orcalight 2260’s

Intro La Palma, Isla Azul. from Isla Azul on Vimeo.

Fergus Kennedy

Shot on Canon 5D mark III with one Orcalight 2260

Orcalight Seawolf A2660 Underwater Video Light Test from Fergus Kennedy on Vimeo.

Pages:«1234567...19»