Posts Tagged ‘Technical Dives’

Scallops, Lobster, and Training on the Lillian.

Tuesday, June 9th, 2009

The Scuba Connection had a charter to the Lillian this week.  Wayne was out with a class. With a few of the usual suspects in tow, the Independence got underway.   NOAA was calling for thunder storms in the afternoon.  The drive out of the inlet was in heavy fog.  Once that open up, we could see on the radar that the rain was following us out (a bit early).  The worst of it hit before we got to the wreck, and mostly cleared by the time Richie had us tied in.

The passengers soon rolled in, and Richie returned with a nice bag of scallops and bugs.   He had us tied into a large pipe next to the engine.  This section of the wreck stood some 20 ft off the silty bottom.  The surface temp was 58.  Bottom temp was 43-48, depending on who you asked, and visibility was a dark 40.  If the sun came out, this would be a fantastic dive.  As it was, it was just great.

The Lillian was a freighter that sunk back in 1939 with a cargo of sugar. It sank in 150 ft of water after a collision in the fog.   The wreck is on the edge of the mud hole, so the conditions can vary depending on the tide.

After seeing all the scallops coming up, I figured I’d have to go out bounce house for sale in the sand to find any.  This proved futile, as the scallops were on the wreck itself.  Once I figured this out, I bagged my share just as my reel decided it did not want to go any further. Flounder were all over this wreck.  Some were so large, I had to check twice.  Many were still buried in the sand.  Those I checked three times.   Ling cod were also about, along with a few Eel Pouts.  One unusual item was the large sponges lodged about the wreck.  These seemed out of place here.  Some were close to 3 feet across, just laying in the sand.  Captain Dan told us to keep an eye out for portholes, so I looked closely as I reeled my line back in.

I headed back to the boilers, and was soon comforted by the sight of the strobe in the distance.  These were great conditions for this wreck.    Back on the boat, we all took turns cleaning scallops.  Several of the passengers had bagged their first scallops, and were learning how to clean them under Captain Dan’s tutelage.

We headed home just as the sun broke through the clouds.  Oh well, it was still a great dive!  The scallop dinner was good too!

What is a Rebreather?

Tuesday, January 13th, 2009

Many people see my dive gear, and ask “What newfangled contraptions is that”? Ok, maybe they don’t use the word “newfangled”, but you get the point. I dive a Closed Circuit Rebreather (aka CCR). While people think of these as “new”, they actually predate the gear we consider standard SCUBA (also called Open Circuit or OC).

History: Early rebreathers were used not for diving, but for escape. Mines and Submarines both presented situations where a compact breathing device was needed to allow crews to escape to safety. Theses were developed back in the early 1900, and produced in quantity by 1910. Open Circuit SCUBA was not commercially available until the mid 1940s.

How do they work: Let’s start with a quick review of metabolism. Our cells take in food and Oxygen (O2). These are combined to produce energy, but have a toxic byproduct of Carbon Dioxide (CO2). Our Cardiopulmonary system takes some of the O2 from the air we breath, and distributes it to our cells. At the same time it takes the CO2 generated bouncy castle for sale by our cells, and releases it into the air that we exhale. The O2 and CO2 exchanged by our lungs is actually a small percentage of the volume of gas that we breath (about 3%-5%).

On Open Circuit, when a diver inhales, the regulator provides the diver with gas (usually air) at same pressure as the surrounding water. When we exhale, the gas is vented out into the water producing the column of bubbles associated with diving.

When a CCR diver exhales, the gas is vented into a flexible chamber called a counter lung. Within the Rebreather, O2 is added back into the gas, and it is passed through a “scrubber” which removes the CO2. We then inhale the same gas which again contains the proper O2 percentage.

With OC 95% of the gas we exhale has not been affected by our respiration. It is not used. It is wasted. On CCR, this 95% is recycled, cleaned of CO2, enriched with O2, and breathed again. This allows us to make use of smaller tanks, as our O2 consumption does not change with depth.

WOW! What a Dive!

Sunday, October 12th, 2008

WOW!   Today’s dive has to go down as one of my top 10 most FANTASTIC dives.  Why?   Where to begin?   Conditions:  50 + ft of visibility.  Over 60 degrees on the bottom. Lots of ambient light. Fish almost performing for our entertainment.

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The bow of the Mohawk

The Independence II headed out for a day of diving.  We decided to head for the Mohawk.   Personally, I have not been there in a while, and was looking forward to seeing the changes in the wreck.   Back when Capt Tom had the Dina Dee II up in Point Pleasant, I used to get visit this wreck regularly.   Today I saw her as never before.

On the way out the we faced a stiff wind from the northeast.   NOAA was calling for 10-15, but it felt more like 20.  The Indy made short work of the chop, and we were on the wreck quickly.   Since I had come down with a cold earlier this week I asked Brandon (aka BAM, aka Dr, Capt, McNasty, aka …)  if he could tie in.  My ears were clear, but I was not sure how quickly I could descend. Brandon agreed, and had us tied in quickly.  After getting the passengers in the water, I geared up.   Just before jumping in, Brandon surfaced and reported on the excellent conditions.

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The Bridge stands off the bottom surrounded by fish life.

Just as he had described, the wreck came into view at 40 ft.  I’ve been on this wreck a dozen times, but never like this!   We were tied into the stern, and I could see the divers off to toward the bow.  There was a very slight current on the bottom, so I opted to head down the starboard (leeward) side.

The fish were hanging out waiting for their for their pictures to be taken.   It was clear that Fluke season was over, because they were everywhere!   Within a few feet bouncy castle for sale of the anchor was a huge doormat with three others along side. (yes it’s fluke spawning season.)   Cunners, sea bass, and tog were everywhere.  Juveniles were about, and bait fish were swimming overhead.  Even a butterfly fish made an appearance.

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Diver passes by the a deck winch

Evidence of the wrecks cargo was evident everywhere. Engines, tires and transmissions were clearly visible among the deck plates.  The ships winches and gear were also clearly visible.  Part of the bridge superstructure still stands behind the prominent bow.

After a great dive I checked both computers to confirm two hours on the wreck.  It was time to head up.  The passengers had finished their dives, surface interval, and were now on dive two.  Brandon had joined me for the last part of my dive, and we decided that I’d pull.

When everyone was on the way up, I jumped in and asked the last diver how much time he would need to hang.  Five minutes.   Dropping down, the wreck quickly came into view again.  I hovered at 60 ft and swam out a little way over the wreck.  Hanging there I was able to determine the structure of the wreck.  How the deck plates gave way to ribs and hull.   It was a wide angle view I’ve never had of this wreck.  I can only equate it to now being able to tell the forest from the trees.

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Engine, transmission and tires from the cargo

There were a few minutes until the last diver would be done his hang, and this view was proving very educational.  The lesson was interrupted when I was startled by a VERY large sunfish. I’m guessing it was between 5 and 6 ft from fin tip to fin tip.  It swam right in front of me, less than 10 ft away.  I’ve seen these fish on the surface, but not on the wreck.  The big eye was definitely watching my movements which I kept to a minimum.  Slowly it swam by, then off into the distance as I regretted not having my camera.

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Deck Gear

I turned my attention back to the wreck, and checked the time.  3 minutes left.   Shortly I was again startled by the large sunfish.  This time it was a bit closer, again passing by very slowly, watching my every movement.  Back to the wreck.    The next pass it became apparent that there were two sunfish of equal size.  I’d never seen them in groups, but there they were. Time was up, and it was time to pull the hook.

During the task I looked up to see three sunfish lined up in formation passing within a few feet of me.   All I could figure was that they knew I didn’t have my camera, and were punishing me!   When I boarded the boat and told the story, Brandon reported that they had also seen sunfish on the surface.  Given 80 ft of depth, they probably were not the same ones, and must be traveling as a school.

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Brandon with gear in tow

We packed up and headed back to port.  A great day of diving under FANTASTIC conditions.   Personally I did not want to leave.  With these condition, who wants to end the dive?

A few items seen this year on Independence II

Tuesday, September 16th, 2008

Justin’s tile and valve from the Stolt.

Mark and Dan with porthole from the Oil wreck

BAM’s bottles from the Immaculata.

Rob brings back a memento from the Norness.

Mark and Terry with a window from the Andrea Doria

BAM’s porthole from the Oil Wreck.

Dave, Mark and a heavy brass valve from the Pinta.

Those are just the ones with pictures.

Lillian and Arundo on the Independence II

Sunday, September 14th, 2008

The Mud Hole!  Always known for bad vis, and difficult conditions.   Today the intrepid divers of Adventure Scuba had the charter, and we headed out for the wreck of the Lillian.  For those of you familiar with South Jersey diving, this is not the Southern Lillian.   This is the real thing.

The Lillian was as US freighter sunk in 1939 after a collision with much larger freighter the Wiegand.  The wrecks is in 150 ft of water about 23 miles from the Manasquan inlet.  Given the distance and the depth, she is not hit frequently.  Given that she is in the outlet of the mud hole, the viability is often poor.  Today was the exception!

We left the inlet with the knowledge that the conditions were forecast to degrade over the course of the day.   The plan was for one dive on the Lillian, then go in shore and hit the Arundo, in 140 ft just north of the mud hole.  The conditions on the way out were favorable, and we made good time.   I took the watch most of the way letting the rest of the crew sleep.   Since I had students today, I knew I could not tie in, so it was the least I could do.   When we hit the Lillian, the waves were 3-4, but the winds were 15+.  This was going to built, but not too much yet.  When Danny jumped in to tie, we could see that the surface conditions were clear, and the sun was clear above us.

Since Captain Dan wanted to jump in later, I went in right away.  We did our checks, and hit the water as soon as the pool was open.  I did my checks and waited at 20 ft.Inflatable Water Slide We did our buddy checks and bubble checks, then quickly dropped down the line.  At 70 ft we felt the thermocline, and the vis dropped off slightly.  I switched my light on, and continued to drop.

We hit the bottom in 150 ft of water.  I was AMAZED at the vis.  We had over 30 ft of of vis with reasonable ambient light.  This was astounding to me.  Every other trip here was in 10 ft of dark viability.  I signaled Kevin to tie off a reel (practice and all).   Then we headed off along the wreck.  Most of what we saw was deckplates, and broken machinery.  My intent was to take a tour of the wreck rather than look for anything in particular.   In retrospect they would have been happy just getting scallops.

We slowly covered the top of the wreck looking in each nook, taking time to understand what we were seeing.  Along the way I stopped to pointed out a few lobsters, scallops, and a rather large monkfish.  I also observed a few open holes where the portholes had been removed.

Time grew short,  or perhaps the better statement is the gas supply dwindled, and we turned on queue.   On the way back I noticed from the empty catch bags, that neither one had capitalized on my birddoging.  We returned to the anchor, and headed up at the designated time.

Decompression was cool at first.  I’ve become accustom to the 48 degrees we’ve enjoyed on the bottom since early August.  Now the 46 degrees seems cool by comparison.  The thermocline came into play quickly, as the vis expanded to over 100ft.  We could now see the entire hull of the Indy above us while we finished our deco in comfort.

While my students failed in the hunter gatherer portion of the class, many of the other passengers had recovered large quantities of scallops and lobster.  There were also reported sightings of portholes, boilers, and assorted artifacts.   I obviously had not made it clear that bribing your instructor with food goes a long toward passing!

Once on the surface, we cleaned scallops and admired lobster, Captain Dan jumped in and did his dive.  He pulled the hook, and Bill maneuvered to pick him up.   Once up, he also commented on the amazing vis.  I’ve only been here a few time, but his reaction speaks volumes.   This was an exceptional day on the Lillian.

With the winds picking up, we headed inshore to the Arundo for our second dive.  The Arundo is the wreck of a Freighter, sunk in 1942 by the U-136.  She sank on the north side of the mud hole in 140 ft of water.  Among other cargo, she was carrying vehicles (jeeps and trucks) as well as a pair of locomotives.  Just for the artifact divers, she was carrying 5000 cases of Canadian beer. (Yup, I’ve got a few bottles.)

When we tied in, I could tell that the wind and current were not aligned.   When I splashed, I was quickly drawn under the boat, as the current was from port to starboard.   While not strong, it’s never comforting to hang a few feet under the large props of the Indy.

Again, once our checks were complete, we dropped down through the clear surface water down to the wreck of the Arundo.  From previous experience, the vis is at best 20 ft.   Today was about average.   We hit the bottom, and I instructed Dave to tie off this time.  During the ride in, they had expressed an interest in the hunter gather portion of the class.  This was not the best wreck for the test, but here goes.   We swam out looking for some sort of quarry.  I’ve never found that many scallops on this wreck, so my concentration was on lobster.  Investigations only showed a few tiny specimens.  Peering under each plate only exposed a large population of eel-pouts.

I tried my best to find some way for my students to prove themselves, but other than a few large tog, there was not much available.   At one point I turned to see them collecting the large mussels connected here and there to the wreck.   Some part of me was repulsed by the thought of mussels from the mud hole, but to each his own.  We finished up our bottom time, and headed up the line.  My bag was empty, but their bags were full of 6-8 inch mussels.

We hit the surface, and headed back to shore.  Kevin was cleaning mussels during the trip, while I tried to grab some sleep. It had been a long day, but a great day of diving!