shallow draft pros and cons - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Boat Review and Purchase Forum > Sailboat Design and Construction
 Not a Member? 


Reply
 
LinkBack Thread Tools
  #1  
Old 01-15-2008
Junior Member
 
Join Date: Jan 2008
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
Mollusk is on a distinguished road
shallow draft pros and cons

I just bought a morgan 321 shallow draft. It draws 4. So far it has performed well under San Juan winter conditions. I had it out in 30 kts with 4' bay chop- no problems. The general mentality up here as far as draft goes is: the deeper the better. There are plenty of deep anchorages and much fewer sand bars than in the east or the gulf. I just want to hear what some others think as far as pros and cons of shallow draft go. Is the stability altered when you get into some really heavy weather? How are they in the open Pacific?
Reply With Quote Quick reply to this message Share with Facebook
  #2  
Old 01-15-2008
Faster's Avatar
Just another Moderator
 
Join Date: Sep 2005
Location: New Westminster, BC
Posts: 15,140
Thanks: 83
Thanked 231 Times in 223 Posts
Rep Power: 10
Faster has a spectacular aura about Faster has a spectacular aura about Faster has a spectacular aura about
Someone like Jeff H can give you a much more technical review, but from a PNW perspective there's not a real need for shoal draft, as you say.

However, you have one so:
You will have an advantage in many anchorages in that you can "sneak" in behind the pack and anchor tighter to the beach of the end of a cove - this will be especially handy in the busy summer season. If stern tying, with caution you can tuck in closer and maybe get out of a breeze or current. You'll still need to keep an eye on the tides, of course.

As far as performance goes, there will be a bit of a penalty, mostly in progress to weather. Your numbers may well look OK, but if you are sailing upwind in close proximity to a similar boat with deeper draft, you will probably find you lose ground on each tack as you will suffer more from leeway. (Assuming both boats equally well sailed, of course)

At sea it will likely be a less noticeable difference unless, again, you need to fight your way to windward, or "claw" your way off a lee shore somewhere....

Many "shoal" versions carry some additional ballast weight to offset the righting-arm loss, so depending on design there may not be a huge difference in "stiffness".
__________________
Ron

1984 Fast/Nicholson 345 "FastForward"

".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)
Reply With Quote Quick reply to this message Share with Facebook
  #3  
Old 01-15-2008
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,291
Thanks: 0
Thanked 11 Times in 11 Posts
Rep Power: 13
sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice
It depends on the boat. If you're talking about a monohull sailboat, deeper drafts tend to be more stable than the same design with a shoal draft.

However, you can also get shallow draft via a multihull... in which case the Pacific was explored by shallow draft boats a long, long time ago. The Polynesian Islanders explored and colonized much of the southern Pacific in multihulls.

One major advantage of shallow draft boats is that you have more areas in which you can anchor. This becomes a huge benefit if you're trying to hide from a hurricane or storm.

A very shallow draft boat can go up small creeks or rivers or into very shallow bays, where the storm's effects will be severely blunted. It also means you can get into more harbors, without necessarily waiting for the tide.
__________________
Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
Reply With Quote Quick reply to this message Share with Facebook
  #4  
Old 01-16-2008
Junior Member
 
Join Date: Jan 2008
Posts: 22
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
Tumblehome32 is on a distinguished road
It has more to do with the angle of vanishing stability and keel side area, not just draft. I would think a lot of Morgan 321 owners could give you the best advice on real world conditions.
Reply With Quote Quick reply to this message Share with Facebook
  #5  
Old 01-16-2008
chucklesR's Avatar
Senior Member
 
Join Date: Sep 2007
Location: Pasadena Md - Magothy side
Posts: 5,979
Thanks: 10
Thanked 31 Times in 31 Posts
Rep Power: 10
chucklesR is a jewel in the rough chucklesR is a jewel in the rough chucklesR is a jewel in the rough
With no lead mine hanging below my Gemini, a wave passes under it and transfers no force to the non existent keel- so in monster waves my boat just slides on the face rather than tripping over a rock like a mono does.

Shoal draft boats generally carry more ballast than their deep draft sister ships, that is designed in to it to compensate for the higher center of gravity.
Reply With Quote Quick reply to this message Share with Facebook
  #6  
Old 01-16-2008
SailorMitch's Avatar
Senior Moment
 
Join Date: Nov 2005
Location: MD
Posts: 1,931
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 10
SailorMitch will become famous soon enough
Concerning whether a shoal draft boat will survive in blue water -- Carleton Mitchell's famous Finnistere was a center-boarder designed by Olin Stephens. Finnistere won consecutive Bermuda races back when.

In sum, yes a deep fin is usually better, but that doesn't mean a shoal draft boat isn't seaworthy or can't go to weather.

Disclaimer -- I sail a P-33-2 with a winged keel that draws 4'2" and I haven't died yet.
__________________
SailorMitch
Sailing winged keels since 1989.
1.20.09 Bush's last day the end of an error !! Hopefully we still have a constitution and economy left by then.


"Compassion and tolerance are not a sign of weakness, but a sign of strength." The Dalai Lama


good planets are hard to find-- a song by steve forbert


I have but one lamp by which my feet are guided, and that is the lamp of experience. I know no way of judging the future but by the past.-- Patrick Henry.
Reply With Quote Quick reply to this message Share with Facebook
  #7  
Old 01-17-2008
Banned
 
Join Date: Apr 2006
Location: MS Gulf Coast
Posts: 711
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 0
seabreeze_97 is on a distinguished road
Intrepid, the Bristol 32 originally built for Ted Hood, has no problem plodding the Pacific between Hawaii and Japan, and they also do well in the Atlantic. While there was a centerboard option, the majority of them were shoal draft at 4 1/2 feet.
Reply With Quote Quick reply to this message Share with Facebook
  #8  
Old 01-17-2008
Junior Member
 
Join Date: Dec 2007
Posts: 14
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
Nottoway is on a distinguished road
Nottoway, my Bristol 39 (40) centerboarder is not unlike Finsiterre, drawing only 4' with the board up. In rough seas, pulling the board up makes the boat less resistent to waves--it slides sideways a little more easily resulting in a less jerky motion. The board is a maintenace headache, however. It broke off in mid-Atlantic and a new one had to be built in the Azores. (The fiberglass board was built with steel re-bar to stiffen it, the re-bar rusted and swelled, weakening the board and rough weather finished it off.) The wire pennant has also broken a few times due to flexing and deterioration where it attaches to the board.
Reply With Quote Quick reply to this message Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now

In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Pros & Cons: Mainsail furling booms Vitamin Gear & Maintenance 6 07-18-2008 04:04 PM
Shoal Draft V. Deep Keel, Part II JohnRPollard Sailboat Design and Construction 11 11-11-2007 12:10 PM
teak decks... pros and cons divesailor Gear & Maintenance 23 04-10-2007 12:08 AM
Winged Keels Pros & Cons OldGlory Boat Review and Purchase Forum 13 04-09-2002 06:51 PM
The Pros and Cons of Smaller and Lighter John Kretschmer Buying a Boat Articles 0 10-09-1998 09:00 PM


All times are GMT -4. The time now is 07:30 AM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.