Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 20-03-2016, 11:26   #1
Registered User

Join Date: Mar 2016
Location: Morro Bay, CA
Boat: Pacific Seacraft Flicka
Posts: 10
Mooring Fields and Catamarans

Hi Sailors,

My captain and I are on a track to own a Catamaran in 2 to 3 years. We live in a port town on the west coast. We have been talking to a local who says that getting a mooring in our town is going to be very difficult because Catamarans act very differently in a mooring field than the comparably lengthed monos. And that they have a stronger pull on the mooring tackle. And that a mooring rated for, say, a 38' mono will not be adequate for a 38' cat.

Will you seasoned cat owners please discuss the ways in which cats are different, and any ways that are used to mitigate the differences?

I've been reading this forum for quite a while and am finally making the move from lurking to asking. Thanks!

LF.
__________________

__________________
Lrfiori is offline   Reply With Quote
Old 20-03-2016, 11:38   #2
Registered User

Join Date: Feb 2010
Location: Caribbean winters, North Dakota/Minnesota summers
Boat: Leopard 39 Owners Version
Posts: 335
Re: Mooring Fields and Catamarans

The biggest way they act different on a mooring is the cat won't rock and roll nearly as much.

As far as swinging.. everyone's boat swings more than anyone else's. Don't believe me? Just mention your boat swings the most at a happy hour on the shore and everyone will say "no, theirs does".

True.. a cat may have a bit more windage so there may be more effort on the mooring.. but they don't necessarily weigh more, so maybe not so much different effect.
__________________

__________________
Privleoplag is online now   Reply With Quote
Old 20-03-2016, 11:40   #3
Registered User

Join Date: Sep 2011
Location: Germany
Boat: secondarily boatless
Posts: 178
Re: Mooring Fields and Catamarans

Hi LF,

that's easy...

A cat follows in general the wind when moored, while monos, due to heavier weight and larger underwater area, follow mostly the current. So if you have wind against current it can get rather interesting. Also, due to the higher windage of the cat, the forces indeed will be bigger.

...not that this ever caused us serious problems...

and remember: A Cat can use moorings in shallow water where the monos won't go.

Happy sailing

Oliver
__________________
Oliver L. is offline   Reply With Quote
Old 20-03-2016, 11:43   #4
Registered User

Join Date: Apr 2013
Location: Mediterranean
Boat: Lagoon 380 #069
Posts: 112
Re: Mooring Fields and Catamarans

We've moored all over the Med and never saw much difference. Cats don't have weighted keels so they will be the same or slightly lighter than the same length monohull.
__________________
yardie is offline   Reply With Quote
Old 20-03-2016, 12:03   #5
Registered User

Join Date: Dec 2011
Location: Boston Area
Boat: Beneteau 423
Posts: 223
Re: Mooring Fields and Catamarans

Quote:
Originally Posted by Oliver L. View Post

and remember: A Cat can use moorings in shallow water where the monos won't go.



Happy sailing



Oliver

Shallower moorings will typically have smaller boats so may not be ready to handle a cat in a blow and may not be spaced for a larger cat. But in the right conditions it does open up more options.


Sent from my iPhone using Cruisers Sailing Forum
__________________
hlev00 is offline   Reply With Quote
Old 20-03-2016, 12:11   #6
Registered User

Join Date: Aug 2008
Location: Pacific Northwest, USA
Boat: 31' Corsair/Farrier trimaran, Lauwersmeer Cruiser in Europe canals. 19' Lightning
Posts: 234
Re: Mooring Fields and Catamarans

The anchor selector of the brand I bought says to go one size up if you have a multihull. So for moderately sized cats i would't think anchor size would be an issue in a well maintained mooring field.
__________________
ejlindahl is offline   Reply With Quote
Old 21-03-2016, 00:51   #7
Registered User

Join Date: Nov 2010
Location: UK, Croatia
Boat: Fountaine Pajot Athena 11.6m Rapa Nui II
Posts: 379
Re: Mooring Fields and Catamarans

Have owned 5 cats and 1 tri, 5 of which permanently moored on swinging moorings where the tide can be fairly strong. 4 centreboard and 2 fixed keel. Its a commonly held belief that multis behave differently to monos, in my experience, absolutely no difference and probably better. I think a bridle helps and stops the buoy impacting the hulls in wind over tide situations, and that is definitely a problem for monos.
As for strength, windage will be greater for a multi but the jerk loads lower because of the lower displacement. My principle is that if you are leaving your pride and joy to the mercies of a swinging mooring, then nothing is too strong, you want the heaviest and largest sinker and ditto the chain and the bridle.
__________________
Rapanui is offline   Reply With Quote
Old 21-03-2016, 02:06   #8
Registered User

Join Date: Jan 2010
Location: Solent, UK
Boat: Beneteau Oceanis 38
Posts: 200
Re: Mooring Fields and Catamarans

Having owned two catamarans, I have noticed differences between them and mono hulls in a mooring field.

The mono hulls seem to mostly react to current whereas the cats were more influenced by wind.

In a tideless/current less bay, the differences aren't too noticeable. But in say a tidal river mooring field where the tide turns the monohull always seemed to go round at the turn of the tide, whereas the cats would behave differently if ther was an opposing wind.

I also noticed that our cats would generally swing around more than a monohull as the keels were shallower. We often used a small drogue off the stern to reduce the swinging.

Mix all this up with a few planing motorboats and closely placed mooring buoys and I understand the concerns.

Garold
__________________
Garold is offline   Reply With Quote
Old 21-03-2016, 03:52   #9
Moderator Emeritus
 
GordMay's Avatar

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 31,592
Images: 240
Re: Mooring Fields and Catamarans

Greetings and welcome aboard the CF, LF.
__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"



GordMay is online now   Reply With Quote
Old 21-03-2016, 06:04   #10
cruiser

Join Date: Feb 2008
Location: North Charleston, SC
Boat: Camano Troll
Posts: 4,669
Re: Mooring Fields and Catamarans

Quote:
Originally Posted by Lrfiori View Post
Hi Sailors,

My captain and I are on a track to own a Catamaran in 2 to 3 years. We live in a port town on the west coast. We have been talking to a local who says that getting a mooring in our town is going to be very difficult because Catamarans act very differently in a mooring field than the comparably lengthed monos. And that they have a stronger pull on the mooring tackle. And that a mooring rated for, say, a 38' mono will not be adequate for a 38' cat.

Will you seasoned cat owners please discuss the ways in which cats are different, and any ways that are used to mitigate the differences?

I've been reading this forum for quite a while and am finally making the move from lurking to asking. Thanks!

LF.
I don't mean to make things difficult, but if you're concerned about getting a mooring in your town, why don't you call or visit the people who control the moorings and ask them?
__________________
rwidman is offline   Reply With Quote
Old 21-03-2016, 06:13   #11
Registered User

Join Date: Apr 2006
Posts: 4,413
Re: Mooring Fields and Catamarans

Of course other issues.... is some mooring fields have the moorings set rather close. This has an impact on the length of the mooring painter/scope... the requirements for swing... boats swing on unrelated to the motion of other moored vessels' swinging..maneuvering through a tight field with an extreme beamed vessel.

The pressure on the mooring is related to the windage of the moored boat to a large extent.
__________________
Sandero is offline   Reply With Quote
Old 21-03-2016, 09:41   #12
Registered User

Join Date: Feb 2014
Posts: 1
Re: Mooring Fields and Catamarans

Garold - I'm curious about your use of a small drogue when anchoring. But it does sound like a very good idea. Can you give details about it (size, design, length, etc.)? Or is it merely a small bucket at the end of a rope?
__________________
Guthrum is offline   Reply With Quote
Old 21-03-2016, 22:11   #13
Registered User

Join Date: Mar 2016
Location: Morro Bay, CA
Boat: Pacific Seacraft Flicka
Posts: 10
Re: Mooring Fields and Catamarans

Thanks for talking about your experiences everyone. Of course we'll be talking to locals but I was sitting here on my couch wondering what you all thought. One person in town said the differences are radical and he won't put us on a mooring.


Sent from my iPad using Cruisers Sailing Forum
__________________
Lrfiori is offline   Reply With Quote
Old 22-03-2016, 12:03   #14
Registered User

Join Date: Mar 2016
Location: Morro Bay, CA
Boat: Pacific Seacraft Flicka
Posts: 10
Re: Mooring Fields and Catamarans

Guthrum, can you describe the drogue you use (bucket o'cement, or...) and how it affects your vessel's swing? Does it dance nicely with the monos?
__________________
Lrfiori is offline   Reply With Quote
Old 22-03-2016, 12:20   #15
Registered User

Join Date: Jan 2010
Location: Solent, UK
Boat: Beneteau Oceanis 38
Posts: 200
Re: Mooring Fields and Catamarans

Quote:
Originally Posted by Guthrum View Post
Garold - I'm curious about your use of a small drogue when anchoring. But it does sound like a very good idea. Can you give details about it (size, design, length, etc.)? Or is it merely a small bucket at the end of a rope?
I tried hanging thick ropes and then buckets off the stern but they didn't work too well so I bought a yacht drogue. Max diameter at the opening was about 1.25m and it was about 1.75m long.

It was a reversed cone shape with a hole in the end to let the water escape. Webbing ties allowed me to fasten it to the stern of the boat with a short mooring rope.

The drogue resuced the dancing round the anchor chain that cats modern cats sometimes do as they are high sided and get pushed round by wind. And without substantial monohull keels, have little resistance to the wind.

Another advantage of the drogue was that in a river, the current would pull the boat round much quicker with the drogue and we would more readily align with the monohulls.

But one BIG word of warning.

I woke early to leave an anchorage and forgot the drogue was attached. With my sleepy head on, I reversed over if after raising the chain. It caught round the prop and being very tough it just wrapped the prop and stopped the engine. After an early morning swim I soon freed it everything. Never again. After that I tied a bag to the wheel to remind me whenever I put the drogue out!

Garold
__________________

__________________
Garold is offline   Reply With Quote
Reply

Tags
catamaran, mooring

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
City Mooring Fields endoftheroad Liveaboard's Forum 5 15-10-2009 08:37
Is there a list of city mooring fields? endoftheroad Monohull Sailboats 0 18-12-2008 20:32
Mooring fields North of Baltimore in Chesapeake? marktun Other 5 17-08-2008 16:01
Photo: Why I Dislike Mooring Fields ssullivan Anchoring & Mooring 88 07-08-2008 14:49
East Coast Mooring Fields?? rleslie Other 1 11-10-2007 12:48



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 06:05.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.