Anchoring - Revision history

Geekeasy at 23:27, 1 October 2021

2021-10-01T23:27:42Z

Geekeasy: /* Chain */

2021-10-01T21:18:15Z

Chain

Geekeasy at 21:15, 1 October 2021

2021-10-01T21:15:10Z

Geekeasy: /* Anchor Types */

2021-10-01T21:14:10Z

Anchor Types

Geekeasy at 20:36, 1 October 2021

2021-10-01T20:36:02Z

Show changes

Geekeasy: /* Anchors */

2021-10-01T20:26:43Z

Anchors

Geekeasy at 19:45, 1 October 2021

2021-10-01T19:45:30Z

Geekeasy at 19:45, 1 October 2021

2021-10-01T19:45:07Z

Geekeasy at 16:44, 27 September 2021

2021-09-27T16:44:05Z

Geekeasy at 15:15, 11 February 2016

2016-02-11T15:15:27Z

← Older revision		Revision as of 23:27, 1 October 2021
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	It is apparently relatively common practice in the Delta to create a secure anchorage by tying off to a tree. A stern anchor would of course also be needed to keep the boat from being pushed into that tree. There are few suitable trees close to Mandeville Point. There are a number of pylons in the channel that cuts through Mandeville Point, and they are frequently used for at least a night or two, especially for boaters who arrive after sunset and are not able to raft up to boats that are already anchored. If you do this, bring citronella candles and bug spray and close your screens, because the closer you are to shore, the more you will be overwhelmed by insects.		It is apparently relatively common practice in the Delta to create a secure anchorage by tying off to a tree. A stern anchor would of course also be needed to keep the boat from being pushed into that tree. There are few suitable trees close to Mandeville Point. There are a number of pylons in the channel that cuts through Mandeville Point, and they are frequently used for at least a night or two, especially for boaters who arrive after sunset and are not able to raft up to boats that are already anchored. If you do this, bring citronella candles and bug spray and close your screens, because the closer you are to shore, the more you will be overwhelmed by insects.
−
−
−	~~= Old content =~~
−
−
−
−	~~== Sean's Basic Anchoring Guide ==~~
−
−	~~== Removing stuck anchors ==~~

@@ Line 78: / Line 78: @@
 [[File:anchor_with_chain.jpg|thumb|left|150px]]
-The chain adds weight to the end of the line and helps the anchor stay set on the bottom.
+Chain adds weight to the end of the line and helps the anchor stay set on the bottom.
-It's recommend that all anchors have at least at minimum 10' of chain in addition to the line.
+It's recommend that all anchors have at least at minimum 10' of chain in addition to the line.  A rule of thumb is that the chain size should have 1/2 the size of the line.  e.g. If you have 1/2" rope for your anchor the attached chain should be 1/4".
 If you're boat only has chain (no line) then there's very little stretch and there could be strong forces on whatever it's attached it.  It's often a good idea to add some line running from cleats to the chain.
 = Howto: Drop an anchor =

@@ Line 13: / Line 13: @@
 Note - Third party knockoffs resembling popular anchors might have slight differences in terms of build quality and geometry that make them not nearly as effective as the name brands.
 == Holding power ==
@@ Line 75: / Line 76: @@
 = Chain=
-[[File:anchor_with_chain.jpg]]
+[[File:anchor_with_chain.jpg|thumb|left|150px]]
 The chain adds weight to the end of the line and helps the anchor stay set on the bottom.
-It's recommend that all anchors have at least at minimum 10-20' of chain in addition to the line.
+It's recommend that all anchors have at least at minimum 10' of chain in addition to the line.
 If you're boat only has chain (no line) then there's very little stretch and there could be strong forces on whatever it's attached it.  It's often a good idea to add some line running from cleats to the chain.

@@ Line 4: / Line 4: @@
 = Anchors =
 == Anchor Types ==
-[[file:hooker.jpg]]
+[[file:hooker.jpg|thumb|left]]
-* Danforth + Fortress - GREAT for Bay Area mud.  Pretty directional and not ideal for heavily shifting winds.  Fortress is lightweight and easy to drop by dinghy.
+* Danforth (shown) + Fortress - GREAT for Bay Area mud.  Great for the mud in the deep water (15'+) areas of the Delta.  Pretty directional and not ideal for heavily shifting winds.  Fortress is lightweight aluminum, a very similar shape to Danforths, and generally a really good anchor.
 * Bruce / CQR - Okay at all types of bottom conditions, but not great at anything.
 * Rocna - New computer based designs, really good in almost all conditions, but $$.
 == Holding power ==

@@ Line 3: / Line 3: @@
 = Anchors =
 [[file:hooker.jpg]]
@@ Line 11: / Line 12: @@
 == Holding power ==
-For Danforth Standard anchors.
+The type of anchor, and it's size (usually denoted by it's weight) determines how big of a boat it can hold in place.  For each anchor type you should be able to find charts indicating what size is appropriate, in how much wind, for a given boat weight or size.
-Weight : Holding Power : Boat size (20knot winds)
+As an example, for Danforth Standard anchors.
 lb : 920 : 31'<br>
 lb : 1300 : 36'<br>
@@ Line 22: / Line 24: @@
 lb : 3500 : 60'<br>
-These numbers assume a minimum of 4-8' of chain.
+These numbers assume a minimum of amount of of chain.
 = Scope =

← Older revision		Revision as of 19:45, 1 October 2021
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		+
		+	NOTE: This page is in the process of being rewritten.

	= Anchors =		= Anchors =

@@ Line 1: / Line 1: @@
-Here's a typical danforth type anchor like the one's we've been using:
+= Anchors =
-[[file:hooker.jpg]]
+* For beginners, 6:1 is our recommended minimum
-They work by lying flat on the bottom, and having their flukes (blades) dig into the sand or mud.  "Scope" refers to the ratio between the line length and the depth.  The more scope, the flatter the anchor lies and the better it holds.
+If there's 10' between the anchor roller and the bottom, 6:1 scope would mean 60' of line/chain out.
-[[file:anchor_on_bottom.jpg]]
+Mark your line or chain in 10’ or 20’ increments. You should be able to know at a glance how much you have out.
 == Scope Table ==
 According to Don Casey, this table shows anchor holding power as related to scope:
@@ Line 20: / Line 47: @@
 :1 	53%<br>
 :1 	35%<br>
 [[http://www.boatus.com/boattech/casey/34.htm|link]]
@@ Line 37: / Line 110: @@
 [[File:anchor_with_chain.jpg]]
 == Local Conditions ==

← Older revision		Revision as of 16:44, 27 September 2021
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	It is apparently relatively common practice in the Delta to create a secure anchorage by tying off to a tree. A stern anchor would of course also be needed to keep the boat from being pushed into that tree. There are few suitable trees close to Mandeville Point. There are a number of pylons in the channel that cuts through Mandeville Point, and they are frequently used for at least a night or two, especially for boaters who arrive after sunset and are not able to raft up to boats that are already anchored. If you do this, bring citronella candles and bug spray and close your screens, because the closer you are to shore, the more you will be overwhelmed by insects.		It is apparently relatively common practice in the Delta to create a secure anchorage by tying off to a tree. A stern anchor would of course also be needed to keep the boat from being pushed into that tree. There are few suitable trees close to Mandeville Point. There are a number of pylons in the channel that cuts through Mandeville Point, and they are frequently used for at least a night or two, especially for boaters who arrive after sunset and are not able to raft up to boats that are already anchored. If you do this, bring citronella candles and bug spray and close your screens, because the closer you are to shore, the more you will be overwhelmed by insects.
−
−	~~== Archive ==~~
−
−	~~See [[2011 Anchoring]] and [[2012 Anchoring]] for reference.~~

← Older revision		Revision as of 15:15, 11 February 2016
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	[[http://www.danforthanchors.com/standard.html]]		[[http://www.danforthanchors.com/standard.html]]

		+	== Local Conditions ==
		+
		+	There is a fairly strong current which runs NS and reverses on a regular basis in the Mandeville Channel. It's a serious hazard for swimmers. And boat with a single anchor down should be expected to swing all of the way north then south with the tides.
		+
		+	Strong winds, up to 20 knots, are common. And they usually come from the West. Your anchor or your largest anchor if you're putting out multiple should probably be put towards the West.
		+
		+	There have been extreme winds (40 knots). All boats should be prepared for the worst of conditions to prevent serious damage to boats or injuries to people.
		+
		+	== Anchoring Near Others ==
		+
		+	Generally boats put down one anchor and drift with the wind and the current. If boats anchor closely near to other boats with each with one anchor and similar scope, they all shift together with the wind and current and avoid collision.
		+
		+	At Ephemerisle, it's been common for islands to put down multiple (3-4) anchors in opposite directions to fix themselves in place. This can lead to collisions even without anchors dragging, if one boat or island is fixed in place and another is shifting freely with the tides.
		+
		+	According to the law, anchoring is first come, first serve. If a boat is already anchored, boats who anchor after them have a legal responsibility not to crash into the boat already in place.
		+
		+	But there's also good manners and maintaining good relationships with your neighbors. If a large boat or a large group of boats (island) has a specific need to be in a particular place, and a smaller boat or island can reasonably relocate somewhere else, it's very nice to do so.

	== Sean's Basic Anchoring Guide ==		== Sean's Basic Anchoring Guide ==