Post by: ridgefire on March 23, 2022, 08:22:31 PM
Post by: bear on March 23, 2022, 08:32:05 PM
Post by: Bullkllr on March 23, 2022, 08:38:00 PM
Post by: jeffro on March 23, 2022, 08:44:03 PM
More or less is based on conditions
Post by: metlhead on March 23, 2022, 08:47:08 PM
Post by: Alchase on March 23, 2022, 08:58:17 PM
Common examples of the minimum amount of chain using the 50 + 2d or 15 + 2d methods are:
10 ft depth let out 70 ft (see how 4 times the depth (or even 5 ) would not be enough)
20 ft depth let out 90 ft
30 ft depth let out 110 ft
40 ft depth let out 130 ft
50 ft depth let out 150 ft
With an all rope Rode (no Chain) 50 ft + 4 x depth, usually works. If in strong wind or current the longer the better.
The objective is to keep the anchor shank horizontal. Not vertical.
For feet use 50ft + 4 times the depth
Post by: Skillet on March 23, 2022, 09:24:50 PM
In your situation, depending on the type of anchor (I'm assuming a Columbia River anchor would be best), I'd look for a 20# anchor and attach at least 5 feet (more is better) of 3/8 BBB galvanized chain to it, then at least 75' of a good 3/8"-7/16" double braid like Samson Superstrong for the elasticity. You definitely want some "spring" in your anchor rode. If you can get 100' in the storage area, that's better. It's far, far better to have more line in the boat and not need it than need it and not have it.
:twocents:
Post by: Karl Blanchard on March 23, 2022, 09:36:34 PM
A fathom of heavy chain attached to the anchor before the anchor line is worth double its weight in additional holding power. This is, as alchase mentioned, because it helps keep the anchor stock parallel to the bottom. Every engineered anchor (besides mushroom anchors, designed to burrow into mud bottoms) relies on a horizontal pull to be effective. The more chain you have attached to the anchor, the more likely the pulling force applied to the anchor will be horizontal.excuse me sir but ropes are for cowboys. On a F/V its called line! First ass chewing I received from my skipper back in my seining days was for calling line "rope" :chuckle: :bdid:
In your situation, depending on the type of anchor (I'm assuming a Columbia River anchor would be best), I'd look for a 20# anchor and attach at least 5 feet (more is better) of 3/8 BBB galvanized chain to it, then at least 75' of a good 3/8"-7/16" double braid like Samson Superstrong for the elasticity. You definitely want some "spring" in your anchor rode. If you can get 100' in the storage area, that's better. It's far, far better to have more line in the boat and not need it than need it and not have it.
:twocents:
Post by: Skillet on March 23, 2022, 09:40:25 PM
A fathom of heavy chain attached to the anchor before the anchor line is worth double its weight in additional holding power. This is, as alchase mentioned, because it helps keep the anchor stock parallel to the bottom. Every engineered anchor (besides mushroom anchors, designed to burrow into mud bottoms) relies on a horizontal pull to be effective. The more chain you have attached to the anchor, the more likely the pulling force applied to the anchor will be horizontal.excuse me sir but ropes are for cowboys. On a F/V its called line! First ass chewing I received from my skipper back in my seining days was for calling line "rope" :chuckle: :bdid:
In your situation, depending on the type of anchor (I'm assuming a Columbia River anchor would be best), I'd look for a 20# anchor and attach at least 5 feet (more is better) of 3/8 BBB galvanized chain to it, then at least 75' of a good 3/8"-7/16" double braid like Samson Superstrong for the elasticity. You definitely want some "spring" in your anchor rode. If you can get 100' in the storage area, that's better. It's far, far better to have more line in the boat and not need it than need it and not have it.
:twocents:
Haha, please notice I called it "rode", not rope! I would fire myself for calling my anchor line "rope." :chuckle:
Anchor rode is the combination of line and chain attached to an anchor.
Post by: Karl Blanchard on March 23, 2022, 09:59:49 PM
Post by: Skillet on March 23, 2022, 10:09:44 PM
You right. I got so excited about flipping you crap I didn't read close enough :chuckle:
Man, I gotta be on my A-game here! :chuckle:
Post by: Magnum_Willys on March 23, 2022, 11:33:10 PM
Post by: bear on March 24, 2022, 06:41:28 AM
Post by: Stein on March 24, 2022, 07:44:18 AM
If I anchored on a regular basis, I would be looking at one of the newer synthetics like amsteel blue, you can get incredibly strong rope that is thin. The 1/4" has a 7,400 pound breaking strength. 1/8" is something like 2500 lbs so you could store a bunch in a small space. 600' would get me anchored comfortably in any place I can take my boat.
Generally, I substitute chain for extra scope and use an anchor ball. When you do that, your boat is horizontal from the ball which is safer than steep angles and the chain/anchor type helps make sure it doesn't drag.
In my very limited experience, the anchor type, chain and bottom conditions are more important considerations than length (assuming reasonable lengths).
Some people will say you need 5, 6, 7, even 8 or 9 times the depth. Those are generally sailboat guys or rules that anchor in 20-40' of water with big boats overnight. I can't think of anyone or any boat I've been on that anchor deep that have a half mile of line up front.
100' with a good anchor and some chain would be plenty for what you want. 50' might work in those rivers but you aren't saving much money and sometimes you want to let out more just to change where you are fishing.
The other problem with letting out too much line is you swing around more and if you are anchoring around other boats it can be problematic.
Post by: Hillbilly Zen on March 24, 2022, 10:28:37 AM
Post by: metlhead on March 24, 2022, 05:32:49 PM
Post by: ridgefire on March 24, 2022, 05:50:15 PM
Post by: bear on March 24, 2022, 08:52:38 PM
Thanks guys. Seems like 50' should be plenty for the rivers around here.
Yep
Post by: 7mmfan on March 24, 2022, 08:58:36 PM
Good grief Charlie Brown! Set the guy up for failure with all this anchor rope math. It's a sled in a river. No chains. No scope. Get 50' of 3/4" easy grab, tie on the anchor, move out smartly and never look back. Make another setup for deep water, Columbia river, hurricanes, or Russian invade.
:chuckle: :yeah:
Post by: Magnum_Willys on March 24, 2022, 09:55:43 PM
Good grief Charlie Brown! Set the guy up for failure with all this anchor rope math. It's a sled in a river. No chains. No scope. Get 50' of 3/4" easy grab, tie on the anchor, move out smartly and never look back. Make another setup for deep water, Columbia river, hurricanes, or Russian invade.Don’t use this below Bonneville or you will be swimming……. 50 ft rope in ft water with tide or current could pull you under.
Post by: metlhead on March 24, 2022, 10:04:35 PM
Post by: spin05 on March 28, 2022, 01:58:28 AM
Post by: ASHQUACK on March 28, 2022, 10:59:39 AM
I have a 20' supervee and on my Columbia anchor I have 300' I do anchor is as deep as 70' with a strong current and have only popped off a few times. On my river/rock/can anchor I have 100' and in really strong current it sometimes isn't enough, but those places just aren't meant to be anchored in. The only other thing I will add is do not tie a knot in the end of the anchor line.