What is an Anchor Rode and Scope? Here is a simple breakdown of the common terms associated with Anchors and Anchoring.
An Anchor "Rode" is the term used for the rope and/or chain that is used to attach an anchor to your boat.
The Anchor "Ground Tackle' is the entire system from anchor to boat.
The Anchor "Scope is the "all important" ratio or amount of Anchor Rode (or line) to let out to properly secure your boat.
The most accepted ratio or scope that I see listed across the internet is a 7 to 1 Scope (Ratio). This simply means that you need to take the actual depth of the water (in this example it is 4 feet) and then add it to the distance from the top of the water to the top of your bow. (this example is 3 feet) Together, the number to work with is 7 (for 7 feet total from bow tip to bottom)
Depending on wind, tide, weather and length of stay, you could use a Scope from as low as
5 to 1 or as high as 8 to 1, but a Scope of 7 to 1 seems to work best.
This means that you multiply the 7 feet (bottom to bow tip) times a ratio of 7 to 1 (which means to multiply 7 feet times 7) and the ideal Scope would be 49 feet of Anchor Rode (anchor line to let out before securing your boat)
In the example above, a 5 to 1 Scope would require 35 feet of Anchor Rode which might be ok for very calm seas in great weather up to an 8 to 1 Scope or 56 feet of Anchor Rode which might be better in rougher seas or running currents.
How deep is the bottom? How much Rode have you let out? No problem - Anchor Rode Markers are available for anchor line and anchor chain. Follow these simple rules for Happy Anchoring!
An Anchor "Rode" is the term used for the rope and/or chain that is used to attach an anchor to your boat.
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| Photo Credit Pyacht.com |
The Anchor "Ground Tackle' is the entire system from anchor to boat.
 |
| Photo Credit HSNA.org |
The Anchor "Scope is the "all important" ratio or amount of Anchor Rode (or line) to let out to properly secure your boat.
 |
| Photo Credit Boatingbasicsonline.com |
Depending on wind, tide, weather and length of stay, you could use a Scope from as low as
5 to 1 or as high as 8 to 1, but a Scope of 7 to 1 seems to work best.
This means that you multiply the 7 feet (bottom to bow tip) times a ratio of 7 to 1 (which means to multiply 7 feet times 7) and the ideal Scope would be 49 feet of Anchor Rode (anchor line to let out before securing your boat)
In the example above, a 5 to 1 Scope would require 35 feet of Anchor Rode which might be ok for very calm seas in great weather up to an 8 to 1 Scope or 56 feet of Anchor Rode which might be better in rougher seas or running currents.
How deep is the bottom? How much Rode have you let out? No problem - Anchor Rode Markers are available for anchor line and anchor chain. Follow these simple rules for Happy Anchoring!
 |
| Photo Credit WestMarine.com |
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