Boys, boys... While a shot line is a time honored technique used by our 
friends across the pond, I must say that going down the anchor line is a 
technique which has been used successfully for many, many years over here 
in the Land of the Big PX.

I can see and the advantages of using a shotline, certainly anyone who 
has had the thrill of "riding the anchor" will agree to this. But there 
are different techniques used for different conditions. Using the anchor 
line allows you to have a very nice setup of guide lines and hang bars 
that enable you deco very comfortably and allow divers to enter and exit 
the water at their leasure.

Quite a few wrecks around here have been depth-charged, wire-dragged and 
trawler dragged to death so it really does not matter where you hook up. 
Which ever technique you use I do think that having some sort of RIB in 
thes water is a critical safety factor.

 Jim

Sender: Ingemar Lundgren  Date: 1/17/99 9:54 AM

>
>
>Capt JT wrote:
>
>> >Thae way i deco when diving wrecks is this:  First of all we never dive on
>> >the anchor line because it can pull off. We have always got a separate line
>> >to the wreck that we do the descent/ascent from. This way we can never lose
>> >the line.  This line is placed at a spot where it is easy to locate for
>> >example on the port side of the bridge.
>>
>> Ok who is the lucky one that free dives on scuba down on a new wreck that
>> is 300 to 400ft and finds this great spot for your ascent line then sends
>> it up.Add current and low vis you get one XXXX up diver.
>>
>
>Ok Mr Messersmith.  The line i am talking about is a shotline with a heavy
>weight.  The divers goes down cuts the line from the weight and tie off to 
>the
>wreck. Really complicated is it not!  I am sure diving the anchor line is 
>much
>better?.  If you can not see the advantage with a separate ascent line you 
>are
>clearly stupid.
>
>> >If  we cant find the line (which has never happened) we inflate the bag
>> >approaching the first stop and lock the reel. Note that we do not tie off
>> >the reel line to the wreck.  When the bag hits the surface it will be in 
the
>> >area directly over  the wreck and the crew will spot it.  If the boat is
>> >anchored the crew will simply put a buoy on the anchor line and drop it and
>> >then start to chase the lift bag.
>>
>> Ok you lose the anchor and send up your bag ,the boat puts a buoy on the
>> anchor and chases the free drifting diver.The free drifting divers buddy
>> did not get lost or there is another team down that did not get lost ,you
>> now have divers decoing on a permanent line to the wreck while the boat
>> goes after the lone dumb ass.YOU NOW HAVE DIVERS WITH NO SURFACE SUPPORT
>>
>> >No risk at all of losing the line because we do not dive on the anchor 
line.
>>
>> No risk you say what about the ones that are left on the wreck? Who is
>> going to help them should they need it if the boat is gone.
>> Do you really think this is a good way?Enlighten me Please.
>
>
>
>If there is current we have a second boat, a rib.  We almost never have 
>currents
>where i dive but when we do we use a second boat.  I do not dive in  
>Jeresy and i
>am not trying to tell anybody how to dive in your area. I am just telling 
>you how
>we dive in our conditions.
>The risk of not finding our line is almost non exsitant as it is placed on 
>a good
>spot. All the wrecks that are deep that we dive are intact. If we place 
>the line
>on the bow for example how are you going to miss the line?  It is pretty 
>basic to
>find the bow on the ship is it not?  Infact in thosands of dives we have 
>never
>missed the line.  If we would miss the line we got it coverd with chase 
>boats on
>the surface.  I think this is a method that works good and it has for years.
>Maybee it would not work in your area and i really do not care either.
>Could you tell me if diving a 400 feet deep wreck how much of the 1/8 inch 
>line
>you would need and how big a bag you would need if the current is 3 mph?
>When i dived the H.M.S Brittanic witch is at 400 feet we had currents of 
>up to 4
>mph. Big buoys of maybee 600 ib  lift got draged down to a depth of 70 
>feet.  I
>do not think that your Jersey up line system would work here. You would 
>need lift
>bags of  800ib and probably a thicker line than the 1/8  inch and it would 
>have
>to bee at least 800 feet long because the current will catch your huge bag 
>on the
>way up.  It would bee pretty much impossible to swim around on the wreck 
>with all
>this stupid gear.  We had CO2 problems from swiming at depth in currents 
>as it
>was already.  And to anchor on the wreck would bee hard because of the 
>depth but
>if you did and the anchor pulled during the dive you are pretty fucked if the
>Jersey upline method fails.  And one other thing we could not carry all 
>the gas
>recuiered for the deco as it would bee pretty stupid to swim around on the 
>wreck
>with 3 deco bottles in a stiff current and add to that your gear of 800 
>feet of
>line and a 800ib lift bag. We had to stage the oxygen for this reason.  In 
>the
>advent of not finding the line we had gas drop stations and several saftey 
>diver
>ready and 3 chase boats   Please enlighten me how you would do this with the
>Jersey up line method.  Do you really think this is a good way?
>
>>
>>
>> Capt.JT
>>
>> >
>>
>> --
>> Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'.
>> Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
>
>
>


 -------------------------------------------------------------------
 Learn About Trimix at http://www.cisatlantic.com/trimix/trimix.html


--
Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'.
Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.

Navigate by Author: [Previous] [Next] [Author Search Index]
Navigate by Subject: [Previous] [Next] [Subject Search Index]

[Send Reply] [Send Message with New Topic]

[Search Selection] [Mailing List Home] [Home]