Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 20-06-2008, 04:25   #1
Registered User

Join Date: May 2006
Location: Cruising the east coast.
Boat: 1994 Fountaine Pajot Tobago-35 "Lauren Marie"
Posts: 63
Anchoring question

We have a 35ft cat with about 18.5ft beam. When we anchor we use a bridle and let out a little more scope than is probably necessary. The issue I have is that the boat will very often ride up over the anchor, especially if the current and wind are not in sync. I've tried using less scope and more scope without much affect. Last evening we anchored out and I watched the rhode very closely. As the boat settled in, it moved forward over the anchor until the anchor was actually behind the boat. Another interesting thing is that the boat likes to sit broadside to the wind..? No daggerboards, just fixed mini keels.

Anyone have any ideas on how to stop the boat from riding up over the anchor? Or what could be causing it?

All input is appreciated.

MikeF
__________________

__________________
mfeene01 is offline   Reply With Quote
Old 20-06-2008, 04:55   #2
cruiser

Join Date: Nov 2004
Posts: 4,525
Mike,

I have a 34' cat and have had several monos. Your boat will wherever it wants while at anchor in areas of current and/or wind.

It will back over the anchor, spin in circles and go all over the place.

As long as your boat stays in a reasonable diameter circle, there is nothing to worry about. All boats do this when currents and wind play together to affect the boat at anchor.

Just use the "more scope than is necessary" and have some fun. Forget about it.

BTW: If the wind/current are at play, we sit broadside on occasion too. If the wind really picks up (15 knots plus), you'll find your boat will then point into it regardless of current.




Quote:
Originally Posted by mfeene01 View Post
We have a 35ft cat with about 18.5ft beam. When we anchor we use a bridle and let out a little more scope than is probably necessary. The issue I have is that the boat will very often ride up over the anchor, especially if the current and wind are not in sync. I've tried using less scope and more scope without much affect. Last evening we anchored out and I watched the rhode very closely. As the boat settled in, it moved forward over the anchor until the anchor was actually behind the boat. Another interesting thing is that the boat likes to sit broadside to the wind..? No daggerboards, just fixed mini keels.

Anyone have any ideas on how to stop the boat from riding up over the anchor? Or what could be causing it?

All input is appreciated.

MikeF
__________________

__________________
ssullivan is offline   Reply With Quote
Old 20-06-2008, 05:00   #3
CF Adviser

Cruisers Forum Supporter

Join Date: Dec 2007
Location: Wherever our boat is; Playa Zaragoza, Isla Margarita
Boat: 1994 Solaris Sunstream 40
Posts: 2,439
Mike, Sean is right about the effect of currents. If they are significant you could try a Bahamian moore - one anchor set forward and one set aft, both off the bow. If you have a backstay (which I suspect you do not), you could also buy a riding sail that is designed to fly off the backstay.

Brad
__________________
Southern Star is offline   Reply With Quote
Old 20-06-2008, 05:22   #4
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
See also:
Anchor Spring Lines
__________________
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 offline   Reply With Quote
Old 20-06-2008, 05:34   #5
Registered User
 
Nordic cat's Avatar

Join Date: Jan 2008
Location: Denmark
Boat: FP Tobago 35
Posts: 721
I pull the boom off center to create a more one-sided load on the anchor, also adjust the rudders to give you this effect. If this isn't enough, let out a bit of the foresail using a barber hauler to get the desired angle of attack without creating forward motion.

When the wind picks up you can revert to normal mode...

Good luck

Alan
__________________
Nordic cat is offline   Reply With Quote
Old 20-06-2008, 08:36   #6
CF Adviser
 
Intentional Drifter's Avatar

Cruisers Forum Supporter

Join Date: Apr 2006
Location: Pac NW
Boat: Boatless, for now, Cat enthusiast
Posts: 1,283
I've used Gord's method on a 44' cat, with success. However, I also agree with Sean -- as long as you're riding OK within the circle, there's no need to be concerned about being over the anchor.

ID
__________________
Intentional Drifter

Observations are gold; hypotheses, silver; and conclusions, bronze.

Democracy is two wolves and a lamb voting on what to have for lunch. Liberty is a well-armed lamb contesting the vote.--Ben Franklin

Everyone is entitled to their own opinion, but not their own facts.--Daniel Patrick Moynihan
Intentional Drifter is offline   Reply With Quote
Old 20-06-2008, 08:43   #7
Registered User

Join Date: Feb 2006
Location: Anacortes, WA
Boat: Maine Cat 41
Posts: 325
What you describe sounds mostly like a wind/current conflict that 'just happens' sometime. As an aside, I've found that mooring off the inboard side of just one bow very often settles my cat down quite nicely. This is especially effective on mooring buoys. The assymetry actually keeps it fairly well balanced and definitely minimizes the hunting back and forth that can happen. Mostly, though I anchor to a bridle and use the one hull method to mooring buoys (however the mood strikes).
__________________
cchesley is offline   Reply With Quote
Old 21-06-2008, 12:37   #8
Registered User
 
svcattales's Avatar

Join Date: Apr 2005
Location: Apollo Beach, Fl
Boat: Privilege 37
Posts: 533
Images: 10
Mike, we've had similar experiences and sometimes the position of the boat seems to defy logic in a wind vs current situation. If you find yourself "sailing around the anchor" a heavy kellet weight will reduce the motion. We use 2ea 15lb barbels tied together and run it down the bridle with a separate retrieval line tied to it. This will "settle the boat down" and reduce the movement. We also use this kellet when we are expecting a blow since it gives a better angle on the rode and gives a little "shock absorber" action when the tension on the rodes tries to lift the kellet.
__________________
Greg, SV Cat Tales
svcattales is offline   Reply With Quote
Old 21-06-2008, 12:58   #9
Senior Cruiser
 
sandy daugherty's Avatar

Cruisers Forum Supporter

Join Date: May 2008
Location: near Annapolis
Boat: PDQ 36 & Atlantic 42
Posts: 1,178
If you are experiencing opposing wind and current, choose one to bet on and either drop a drift chute on a bridle at the sterns, or fly a steadying sail from the back stay.

A drift chute is a small parachute used by fishermen. It should have a positive bouyancy to stay off the bottom. A steadying sail is a small triangular flat sail of about 30 square feet which hoists on a backstay; its single sheet ties forward, and puts a CEP well aft. A cat could use two if it has twin backstays, or you could tack it to a cleat and hang it from a halyard. Frequently a bimini does great for this purpose.
__________________
sandy daugherty is offline   Reply With Quote
Old 22-06-2008, 18:42   #10
Registered User

Join Date: May 2006
Location: Cruising the east coast.
Boat: 1994 Fountaine Pajot Tobago-35 "Lauren Marie"
Posts: 63
Thanks to everyone for your input. I'll try some of your solutions, especially the "don't worry about it" solution. I'll just make sure the anchor is set well, let out a little more rode and have a sundowner. Pretty sure that with enough empty bottles, I can hang a kellet weight on the bridle.
__________________
mfeene01 is offline   Reply With Quote
Old 23-06-2008, 14:08   #11
Eternal Member
 
imagine2frolic's Avatar

Join Date: Feb 2008
Location: Las Brisas Panama AGAIN!
Boat: Simpson, Catamaran, 46ft. IMAGINE
Posts: 4,508
Images: 123
I think the problem with this situation is that others don't realize that cats wander. They anchor close as if we are another mono, and we just don't lay the same wat as a mono. Try tying off a bucket at the stern. Sometimes this can be of help, because it pulls the stern in line with the current.......SOMETIMES......LOL, or get so close to the beach no one else will come close to you................
__________________
imagine2frolic is offline   Reply With Quote
Old 23-06-2008, 14:58   #12
Senior Cruiser

Cruisers Forum Supporter

Join Date: Mar 2006
Posts: 1,594
a bahamian moor

What you describe is very common in any area with current and wind. When the current is stronger than the wind you point into the current and visa versa. And with strengths of either being variable you can end up pointing around and around. A very big pain in the ass but easily cured.

Drop your primary anchor and fall back off the wind, way way back and drop another anchor. Both anchors from the bow. Now pull yourself back up toward the first anchor to the required scope and secure both rodes at the bow. the idea is to have one anchor up wind and the other up current. This way when the current gets stronger than the wind as it relates to your boats heading the boat will swing and hold with the other anchor instead of doing the big circle. The angle between the two anchor rodes will depend on the relative angle of the wind to the current, but something close to 180 works for lots of situations. IE the anchors are in a straight line with the boats bow in the middle.
__________________
Randy

Cape Dory 25D Seraph
rtbates is offline   Reply With Quote
Old 23-06-2008, 15:14   #13
Eternal Member
 
imagine2frolic's Avatar

Join Date: Feb 2008
Location: Las Brisas Panama AGAIN!
Boat: Simpson, Catamaran, 46ft. IMAGINE
Posts: 4,508
Images: 123
The Bahamian moor is good, but sometimes you come in, and everybody is on a single anchor. I have had this happen with only 6 boats in the anchorage. I followed with a single anchor, and had plenty of room to drift around. Left for the day on a dinghy trip, and returned to 20 boats in the anchorage.

When the current switched, and the wind countered all the monos were in line like ducks, but I was sailing all over. I nearly hit a VERY BEAUTIFUL boat. Even though I was there before most, and it was about 10 in the evening. I picked up anchor, and just sailed onto the next anchorage.

I am just happy the current change wasn't at 3am..........
__________________
imagine2frolic is offline   Reply With Quote
Old 23-06-2008, 19:05   #14
Registered User

Join Date: Oct 2007
Location: St Charles MO
Boat: Easterly 36 Aft Cabin
Posts: 180
If the current does not change, tide out tide in, ie straight line curents, you can run an anchor off the bow and stern. the anchors and current can hold againt the wind.
__________________
7.25 years until the Carib
easterly is offline   Reply With Quote
Old 29-06-2008, 22:08   #15
Registered User
 
Little Otter's Avatar

Join Date: May 2008
Location: Cumming, GA
Boat: Ranger 22, currently saving for a larger cruising boat
Posts: 527
Images: 3
Use a bahamian moore like SOUTHERN STAR said the back anchor will counteract the boats tendency to go over the anchor and the front will keep it from going backwards or you could try bow anchors spread really wide.
__________________

__________________
Sailing and exploration are necessary for life to endure
Little Otter is offline   Reply With Quote
Reply

Tags
anchor, anchoring

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
Anchoring for a Hurricane jimisbell Anchoring & Mooring 68 06-06-2008 21:35
Anchoring Questions Bear Essentials Atlantic & the Caribbean 4 02-04-2008 10:13
Anchoring question shellback Anchoring & Mooring 32 04-05-2007 22:45
anchoring vs mooring Sand Dollar Seamanship & Boat Handling 22 16-03-2007 12:51
Anchoring comfort d0ug Anchoring & Mooring 28 26-02-2007 20:46



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 22:28.


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.