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Crestline Experimental Dive Unit



Breaking News:
FEOR's have gone the Distance.


After action report
of the
CEDU Special Operations "A" Team
in
Underwater Navigation/Distance Rebreather Swim



Date:                            DTG 20020210 1830Z                 (Thats Sunday, 10 Feb. 2002, 10:30AM)
Location:                    Malaga Cove/RAT Beach California
Coordinates:             From:  33 49.44 N   118 23.42 W
                                      To:      33 48.47N    118 23.34W

Personnel:                 Rogan, J, CEDU, The Admiral & Logistics Coordinator, Photographer
                                      Iannello, R, Director Crestline Experimental Dive Unit, Swimmer
                                      Simmel, E, CEDU Equipment Evaluator & Tactics Instructor, Swimmer
 

Equipment:             FEOR Light, FEOR ExCap, Navigation Board
Weapons:                   Dive Knife, Light Stick, Lobster Gauge/Bag, Fists

Objective:                   One Mile Rebreather swim, arrive at the P.V. Estates Beach Club
                                         within one hour of start
Obstacles / :               Patrol craft belonging to the L.A. Office of Homeland Security,
      Dangers                   aka L.A. Lifeguard Baywatch Boats

Surf Condition:        1-2 foot surf, 10-15 second surf interval
Water Visibility:        15-20 foot, reduced to 0-1 foot at very end of course
Water Temp.:             14.4C / 57.9F
Bottom Condition:   Sand bottom, occasional rocks
Flora:                           Some Ribbon Kelp, and Giant Kelp
Fauna:                         Bat Rays and other fauna indigenous to the So. Cal. Bite littoral

Maximum Depth:       5.2m / 17fsw
Average Depth:          3.8m / 12.5fsw  (freebee from the computer)
Mile Swim Time:         46min
Total Dive Time:         53 min
Swim Rate:                  56 kpm (kicks per minute) at the beginning,  which slowed down to,
  (kicks per minute)    44 kpm about 25 minutes into the swim.
O2 consumption:       1.08 slpm (total dive time)
                                          [O2 use was determined for one diver only]

Nav. Accuracy:            40m / 130f of intended target location

Observations/Notes: (report follows)

    It can now be said that the FEOR's have a few miles under their belts.  It was on a beautiful Sunday morning,  10 February 2002,  that a One Mile Underwater FEOR Compass Swim was planned and successfully conducted.

    The exercise was planed to: (1) evaluate the FEOR's performance in a continuous swimming mode, (2) evaluate MY performance in a continuous Swimming and Navigating  mode, as this would be the first time I would navigate and swim a mile nonstop  while diving (No sightseeing and No underwater photography today) and of course,   (3) to enjoy a day in the Pond.

    With equipment (FEOR-light and FEOR ExCap) prepared, and pre-dive briefing conducted,  the "A" Team assembled for final inspection.


Final Inspection. (Obligatory "Hero" Shot of   Bob &  Erick)
(Just in case, this picture may have been useful for Search and Rescue Personnel.)

    The plan was simple, surface swim to our descent point.  (Just beyond the surf zone.)   Take last minute compass bearing, drop to the sea floor.  After sorting out gear, connecting buddy line and checking depth and bearings we Started the clock and Started Swimming.

    And Swim we did......


At the Start, Palos Verdes in background.                       Navigation Chart

    Technically it was a straight forward swim, almost uneventful if you will.   A cardinal compass heading, a hard bottom, and we paralleled the coastline.  Visibility was good in the  15-20 foot range most of the way.  There were some areas  where the visibility did reduce to 0-1 foot at the very end, where kelp and other debris tends to accumulate.   Sea conditions were mostly 1-2 foot,  with a very long wavelength between sets.  Being in close to shore we were swimming in the influence of surge, which moved us about 5-10 feet from center.  It was best to concentrate on the compass, and not the bottom moving back and forth(and back and forth and back and forth and back and ....).


Can you find the FEOR Divers in this image?
 


There they are, in last minute gear checks B4 entering the Pond.


    Sightseeing was not allowed, but we did see about a dozen Bat Ray's swim by.  We also noted some small rays and other flat fish in the sand,  kelp bass and a rock crab.  Unfortunately no lobster was seen. They must have sensed our license, gauge, and bag, and therefore stayed hidden.

    There was one moment of interest as Erick signaled me with a tug on the buddy line.  He had me stop on the bottom for a moment and pointed to his ear.  I though he was having an ear problem, but just then I noticed the shadow of a boat passing directly over head!  With my 1/4 inch wetsuit hood, and in focused concentration of navigation and depth control, I did not hear the boat.  Looking up, the boat seemed enormous to me, though it was only about 15-20 feet in length.  It  was a bit startling to have a boat pass that close overhead.  We were only at a max. depth of  17 feet, which would put the boats propeller about ten feet away.  It was an odd, brief encounter.  My thought as the boat passed was the hope that he was not trolling.  This is as close to a combat swimming situation as I care to come, although Erick may have other plans for me in the future (... he was mumbling something about Limpet mines, but we will leave that for another report.  And yes, we have no hand grenades either.)

    I didn't think that there would be boat traffic as close to the beach as we were.  I will think about boat traffic a little more carefully in the future, and I  will do my best to keep my ears on.      The stop only lasted for a few seconds, and we were back on our swim.


Heroes at the Finish.                Overall view of the course. (A great day for a swim.)

    How did the units perform? Flawlessly.  These are manual addition oxygen rebreathers, and you do have to crack open the tank valve to add oxygen to the system occasionally.  There really was no inconvenience to operating the oxygen addition valve periodically even while maintaining compass heading and depth.  It was not considered a stress factor.

    What was a stress factor for me was the body position I maintained doing this exercise.  Arms were stretched in front holding the navigation board and my head was looking forward.  Normally my arms are to my side, and I am looking down. (At the pretty fishies...)  My 1/4 inch wetsuit is cut such that the arms are to the sides and head is looking forward.  In the above mentioned swimming position, muscle energy is expended to stretch the neoprene for arms forward, head forward navigation swimming.  I also noted that my back was in a flexed position.  By the end of the swim my lower back was getting a bit sore.  It was good to take off the weightbelt and stand erect again.

    The navigation came out better than I expected, as we arrived within about a hundred feet of the intended destination. (I thought that was great.)  Erick was a perfect swim buddy.  Though we were connected together with a "buddy" line, the only time I was aware that we were tied together was when he signaled me with a tug of the line.  I am the slower swimmer, and Erick did a perfect job of matching my speed.  Being just out of my peripheral vision, it was a little odd swimming with someone for so long and not seeing him.  I had to turn around occasionally just to make sure he was there.  My swim buddy kept a log of my fin kicks and other timing information, and provided operational security.  (As mentioned above with that boat passing incident, it seems that the intensity of my navigating left me a bit vulnerable.)

    In all it was a GREAT swim, and very motivating.

    Finally a very big Thank You goes to my wife the Admiral Jane, for taking the pictures, providing all the logistics support, and of course for all her love.

Sincerely,
Robert Iannello,
Director, CEDU

P.S.   The CEDU  highly recommends that all of you rebreather divers (for the fun of it),  swim an underwater mile to tune up both your equipment and yourself.   Try it, you'll like it.

(Oh, and yes I must tell you that this is just one more hoop to jump through in order to become a member of the CEDU.  The bar keeps raising....)
 



Remember the CEDU reminds you to always think of Safety when you take the plunge.

                        There's only one step down from here, baby,
                        It's called the land of permanent bliss.
                        What's a sweetheart like you doin' in a dump like this?

-Bob Dylan


(And now a word  from our sponsor.....)
 
 


FEOR is there.
The only rebreather backed by Neptunus Rex himself.

Gentleman, Choose Your Equipment.

With so many choices in closed circuit gear, which do you choose?
The FEOR comes in many Styles and Configurations.
Become an UnAuthorized HomeBuilder and make your own.
Then you can
Dive Into Oblivion with the CEDU.



        Please note that all items seen on  these pages that come into contact with high pressure oxygen have been Oxygen Cleaned, Oxygen Converted, Oxygen Compatible or Designed for Oxygen use.
        You will be in for a rude awakening if you connect a scuba first stage to a high pressure oxygen tank; the rubber/nitrile o-ring(s),  internal lubricating grease, moving potentially spark generating parts,  and other contaminants are all potential sources of heat / inigition / fuel which can have catastrophic consequences in a high pressure oxygen environment.
        Building Rebreathers are a fun hobby, but it can also be fatal even before you make it to the pond.

OSHA States:
         "Compressed oxygen cannot be used in a device designed for compressed air because minute amounts of oil or other foreign matter in the device components can cause an explosion."  In fact, 30 CFR 11 prohibits certification of any device designed to permit interchangeable use of oxygen and air.
        It is an accepted safety rule that:  OXYGEN NEVER BE USED IN A DEVICE UNLESS IT IS SPECIFICALLY  DESIGNED FOR THAT PURPOSE.


Congratulations to the latest Honors Recipients.
A major step into CEDU membership has been accomplished.
Additional information about membership will start with an Application. Other requirements such as the MudRun and the Rough Water Swim#1, #2 follow.... Good Luck.

-Dr. Bob, Director CEDU

More information about Rebreathers/SUBLIME/and the CEDU can be found starting at Dr. Bob's The Home Page
 

"To Swim Is Human, To Dive Is SUBLIME"

And Remember CEDU's Mission Statement:
"To Design, Assemble and Use Homemade Dive Gear While Maximally Stroking Our Own Ego's and Maintaining the Merest Semblance of Sobriety for the Benefit of Mankind"