At 07:51 PM 12/19/04 +0000, you wrote:
The towing eye for me was over a thousand dollars. I hated the
requirement. I understand why Nordhavn had the requirement,
it is less safe to tow a boat from 9 feet above the water.
The 47 bow is 9 feet above the waterline. Lower lines helps
control the bow from hunting and burying itself which puts
unnecessary stain on the tow boat.
Nordhavn had to be prepared to tow a vessel. If I was going
to have to tow a vessel a thousand miles, I would want to
be towing from the waterline.
I have done some towing in the ocean. I have some serious doubts about the
requirement. There was a lot of money put into that by the whole fleet. If
this is such a good idea, and it is so hard to retrofit, why is it not part
of the standard equipment on a Nordhavn? I think the central issue and
question, is what was the decision process like, that brought this
requirement? If it was a matter of somebody saying this is a good idea,
cost be hanged, then I think the decision was poorly come to. As a
practical matter, the idea itself is quite sound and in general I am all
for it. But, everything should have some kind of cost/benefit ratio, and I
think that there are alternatives that are a lot less costly and nearly as
effective.
If it were up to me, I would have opted for a split leg chain bridle with
chaffing gear attached at the bow. The bridle made of as heavy chain
sections as could be handled by the crew aboard, in rough conditions. For
instance, you don't see barges being towed from a single point near the
waterline. Now a barge being flat ended is not the same as the contoured
forward sections of a cruising boat. All of this process is driven to some
extent on the chances of having to tow a boat and the conditions to be
coped with during the initial hook up and during the actual tow itself.
The fact is there are tradeoffs of ease of implementation and usage versus
cost that are not easy to weigh. But, the advantages are not nearly as
clear cut as our illustrious poster implied from the material I snipped.
For instance, the chain bridle that I suggested has the major advantage of
providing more sag than the direct to the waterline method. This sag is a
major component of a sound towing system and the evidence is the way in
which barges are towed in the open ocean. The bridle with it's spread legs
has the tendency to keep the tow better lined up. The tow pivot point is
behind the bow, which has some good effects at maintaining a stable course.
From what I can see of the situation, it is not clear cut that the
requirement is necessary, nor that it is the preferred method.
Stand by for incoming email.
Mike
Capt. Mike Maurice
Tualatin(Portland), Oregon
I've entertained putting a tow-eye on Curmudgeon, but for different reasons.
I like the idea of running the snubbers through the eye to keep the pull on
the anchor close to the waterline. If they serve multiple purposes builders
might be more likely to install them as standard equipment.
My pals with Nordhavns also spend a lot of time on the hook so it would seem
to be a sensible offering.
Regards....
Phil Rosch
Old Harbor Consulting
M/V Curmudgeon MT-44TC
Currently moored in Man-O-War Cay, Bahamas
I asked for and received a waiver for the towing eye requirement, and
satisfied the organizers with somethink like you suggest. I had chain
around bow cleats shackled to 20' pieces of 1" line with thimbled eyes on
both ends. The outer ends of the lines were shackled to a 3" diameter 1/2"
stainless ring. The line had chafing gear at the hawseholes consisting of
heavy hose material split lengthwise and taped.
Hal, Que Linda
If it were up to me, I would have opted for a split leg chain
bridle with chaffing gear attached at the bow. The bridle
made of as heavy chain sections as could be handled by the
crew aboard, in rough conditions.
[This E-mail was scanned for viruses.]
Mike, it does make anchoring sense once you work out a method to do it
easily. But then, it should be a standard feature - properly engineered. I
have assumed that the requirement was to avoid chafe and crew members
having to go forward in heavy seas to check and renew chafing gear.
Ron Rogers
Willard 40 AIRBORNE
Lying Annapolis