October 26 - What A Drag!
 

Wayne.B wrote:
On Sat, 27 Oct 2007 09:53:59 -0400, hpeer wrote:

A couple of days later I unintentionally left the GPS plugged into my
car overnight with the track turned on. The next morning I had a
"scatter plot" for my track covering a couple of hundred yards.

You need a better GPS. Seriously.


No, the GPS is fine. There are things that can and do affect the
accuracy of GPS SYSTEM from time to time.

It likely that, as previously suggested, my location kept me from
getting a sufficient number of satellites.

Still I wonder why it wandered off and then back onto track. I have
never seen this unit do it before or since, and I have used it several
hundred hours.

GPS Errors and Anchor watch; was: October 26 - What A Drag!
 

On Oct 28, 8:45 am, Mark Borgerson wrote:
...The data was NOT
averaged over the 1-minute interval.
....
Maximum Position Error: 32.0 feet.
Average Position Error: 9.6 feet.
....

I've found that with my GP-31 (an older unit w/o WAAS) with 2 second
position averaging that in practice the GPS makes an amazingly
accurate anchor monitor. What happens to your data when you average
pairs of your 1 hz data?


1. With a modern GPS and a well-placed antenna, GPS precision
should not be a limiting factor for anchor alarms if you
are in an area with good WAAS corrections. ...

Really, you don't even need WAAS. I've lived at anchor for years on
my boat that holds all of my possessions in remote places with little
hope of outside help if I get into trouble. I take this seriously. I
don't think you can get better relative position data from anything
short of horizontal sextant angles and I wish you well getting them in
the dark.

2. Anchor alarm radius has to account for swinging
to the anchor in normal winds ...

The anchor alarm should be based on your position from the anchor not
from the position the boat takes after anchoring. I mentioned how I
do this with my GPS in my previous post.

3. Waking to the alarm with a wind or tide change is probably
preferable to setting the alarm radius so large it
will accomodate such changes.

Your alarm should not go off unless your anchor is moving.


4. GPS anchor alarms tell you nothing about the
position of other boats in the anchorage. ...

I guess I'm lucky since I don't usually have to anchor so close to my
neighbors that this is a problem. Of course, if swinging will put you
onto a coral head or some other hazard you need to restrict your
swinging. If you need to know if the wind or tide is shifting (say
you're anchored in a roadway) you should set the anchor alarm to the
boat's position rather than the anchor's and it will tell you when you
swing.

-- Tom.

October 26 - What A Drag!
 

"Bob" wrote
Combine these experiences with my total lack of civil demeanor
in this place makes for some pretty outlandish statements.

Thanks for 'splaining. You're not all bad. (Just some...)

October 26 - What A Drag!
 

"Skip Gundlach" wrote in message
ps.com...
On Hi, Jeff, and Group,

I probably shouldn't continue with this, as my name is already mud, ya
know, but, just a couple of observations...

Not a bad suggestion. And if you've bothered to read for content
rather than merely to find something to shoot at, you'd have seen that
I have done just that. However, having completed my assignment for
the day, I went back to entertaining my two lady companions.

For now, I'm considering whether I want to go out in nasty stuff (not
dangerous), flying down to Solomons, or take another day in Cambridge
and go to church, instead.


Don't let 'em get to you Skip.
You're living the dream and having fun. If we all wanted a risk free life
we'd hardly step outside the house.

October 26 - What A Drag!
 

On Oct 28, 2:15 pm, Bob wrote:

Ah,, come on guys. I dont get to be an ass hole any place else. To be
honest I have had a gut full of collegial congeniality. To be honest
Skip reminds me too much of who Ive had to work with for the past 16
years. Well meaning, likable guys who go to church, smile and nod
their heads then completely ignore some petty good advice from some
pretty smart guys that post here (me excluded). I find it refreshing
to say it the way it is. I wish for once he would just tell me to go
get ****ed.

:{)) Heh. LOL ROFL Guffaw!

Come on, Bob. You know me better than that by now. Unless it would
give you great pleasure, in which case I don't mind, tongue in cheek,
because I've never told anyone that and meant it (in the spirit
intended, anyway - sometimes as a curative, but not as a
pejorative)...

And, you also know that I don't ignore good advice. I may not comment
on it, but if I see it I never ignore it...


I enjoyed someone's description of this place a few weeks ago. I can t
remember the analogy but something close to, is like a bar that
doesn't close and will let anybody make a fool of themselves without
getting kicked out. I thought that was a right-on description.

Heh. So, what have you got against me doing that?? :{))


Skip asked, what kind of shakels do I use attaching road to chain,
chain to anchor.

Two words:
1) Trawlex Grade 100 chain to anchor. Theyre cheep, small, and strong
ie G100 compared to G40, an not galvanized. So I just swap it out once
a year when I inspect my ground tackle. If a 400' factory trawler uses
them to drag a 100 MT bag of Pollock out of the Bering Sea I think its
good enough for my needs.

Seriously, though - what do you use for chain (I presume what you've
described is a shackle specific to a chain usage)? And, if you use
very high tensile shackles, and swap them out, is the chain similar,
or is it more standard fare? If you have a large anchor and all
chain, do you use a windlass?

In my case, the extra strength was from SS - which I also have to look
at each time I'm up there. So far, no difficulties with either the
galvanized swivel or SS shackle - but there's always a first time...


2) Nylite thimble (Samson) road to chain connection. If you don't know
about these pretty PLEASE go to this link and take a look. The USCG
use them on OR/WA/AK life boats.http://www.samsonrope.com/site_files/cm2004.pdf
and no.... it wont go through your gypsy. But then I get a bullet
proof 95-100% connection.

Ya, they're good stuff. When I have all chain, it's not relevant.
However, your use suggests (and later below, perhaps some migration of
rode) that you have mostly rope rode - is that the case? Different
strokes for different folks, and also bottoms, so I'm not criticizing
- just curious. Of course, until you get to the end of it, other than
extremely deep anchoring, mostly rope rode is pretty easy to
manhandle, or if the boat's small enough in any case. Certainly, when
I was on anything smaller than 40', I didn't use a windlass, and it
was mostly rope, with a small length of chain, usually on a Danforth
or equivalent. And, as discussed long ago in this thread, perhaps that
would have prevented my most recent excitement - that is, if you
discount the 25* heel aground at the muni wall in Cambridge this
morning (high tide resolved that with no issue whatever) - despite my
having had what would normally have been far superior stuff (all chain
on a very large anchor). Back to thimbles...

My windlass wouldn't pass such a thimble, even if I had another
shackle between it and the chain, as its pipe is too small. However,
for the one where I do have a hawse pipe (the oval thing with a
cover), and part rope and part chain, it could work just fine, as I
have to manually lead that one, anyway. If I find myself using that
much rode (where I get into the rope portion) frequently on my
secondary, I might make that change.


And no I don't use three strand nylon for road. I use nylon double
braid. Although I might go to some of the 12 plait products soon. Very
easy/fast to splice and still get 10 percent stretch at 30% load. Oh,
and tough as nails. Oh, and CHEAPER!

There are lots of ways to do stuff. Just got to stay out of West
Marine and Cruising World.

Ehh. A Port Supply card goes a long way. But I bought my last chain
(300' 5/16HTG40) and anchor (75#CQR) someplace else for significantly
less than even Port.

OTOH, all the prior suggestions, in prior threads in years past, about
various industrial supply and chain houses, were fruitless. Couldn't
do a thing with the equivalent sizes, and gave up after trying very
hard.

So to all a sincere apology. Just don't look for a change any time
soon in my phatic conversation style.
Bombastic Bob

:{)) Phatic?

L8R

Skip

Morgan 461 #2
SV Flying Pig KI4MPC
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October 26 - What A Drag!
 

On Oct 28, 4:59 pm, Dave wrote:
On Sun, 28 Oct 2007 11:15:44 -0700, Bob said:

GOM diver mostly on
scrap jobs (salvage) 10'-320

Did you dive air or mixed gas at the 300+ depth?

Hi Dave;

Any job over 180' was gas. Although there was an OSHA or USCG reg that
said had ot have gas availible for any jump over 180' .... I think. My
memory fades.............

Although it was not unusual to do a 200' for :30 dive on deep air, of
course SUR D -O2.

Things have changed now though..................
DIT 107/80
Bob

October 26 - What A Drag!
 

On Oct 29, 6:39 am, Dave wrote:
On Sun, 28 Oct 2007 22:30:22 -0700, Bob said:


Sounds about right. You sure did get a nice buzz on a 200' air dive, though.
And didn't freeze you A off.

I'm sure. I think my last dive was in 1971. Did you happen to see Men of
Honor?

Hi Dave,

Of course I saw Men of Honor! I grew up on Mike Nelson's Sea Hunt
too! I heard somplace that the Mk V gear and some of the extras were
all from DIT , Divers Institute of Technology in Seattle..... well,
actually Ballard,WA. Thats were I got my trade school tranining.

As for the air buzz, yes rather enjoyable side to it. The drag was
crawling into the chamber an cooking at 40' for 1 or 2 hours. It got
God awful hot in side.

But that was 25 years ago............... Now my only excitment is
yelling at Skip.

Bob

October 26 - What A Drag!
 

On Oct 29, 9:48 am, Dave wrote:
On Mon, 29 Oct 2007 10:07:23 -0700, Bob said:


Those matters aside, I did enjoy the movie.

HI Dave

Darn............. youre the real deal!

Most of the DIT instrtuctors were all retired USN salvage guys. Great
instructors! Lots of good sea stories too. There was an instructor ex
Master Chief Schneff. Great guy and think he was doing the same as you
at the same time. Now that was a guy who new salvage
operations.......

Dont know if DIT is still using the Mk V anymore. When I was there
that was the dress we used for the first week. Ugg, 196 lbs if I
remember right. THey also had one of thoes monster Mk V style gas
suits on display. Gear shure has come a long way. I used a MIller 400
in the GOM. I couldnt emagin using that navy gas rig and getting
anything done.

Good to yak with you. Do you ever get a chance to blow any bubbles any
more. Im a common airbreather now. I cant be trusted with anything
more than a mask and snorkle.

I liked the move too......
Bubble Head Bob

October 26 - What A Drag!
 

On Oct 29, 12:07 pm, Bob wrote:
On Oct 29, 6:39 am, Dave wrote:

On Sun, 28 Oct 2007 22:30:22 -0700, Bob said:
Sounds about right. You sure did get a nice buzz on a 200' air dive, though.
And didn't freeze you A off.
I'm sure. I think my last dive was in 1971. Did you happen to see Men of
Honor?

Hi Dave,



Of course I saw Men of Honor! I grew up on Mike Nelson's Sea Hunt
too! Bob


Me Too! My favorite was Eposide 6..The Gracy grope.
http://www.youtube.com/watch?v=J_XY-C9M1Cw

Joe

October 26 - What A Drag!
 

"Joe" wrote in message
ups.com...
On Oct 29, 12:07 pm, Bob wrote:
On Oct 29, 6:39 am, Dave wrote:

On Sun, 28 Oct 2007 22:30:22 -0700, Bob said:
Sounds about right. You sure did get a nice buzz on a 200' air dive,
though.
And didn't freeze you A off.
I'm sure. I think my last dive was in 1971. Did you happen to see Men
of
Honor?

Hi Dave,



Of course I saw Men of Honor! I grew up on Mike Nelson's Sea Hunt
too! Bob


Me Too! My favorite was Eposide 6..The Gracy grope.
http://www.youtube.com/watch?v=J_XY-C9M1Cw

Joe



That series got me started diving. I still have my double-hose reg. I used
to have two steel 52s. When I first got them, I tried the old
toss-the-tanks-over-my-head-to-put-them-on thing. Man, that didn't work
without a lot of hurt.


--
"j" ganz @@
www.sailnow.com