Quick follow up question to jdonalds - when you toss the anchor off the bow with the anchor buddy after pulling out and the stern line is tight, how much anchor rope should I put out? Twice the depth under the boat, or more? Again, I apologise if the answers to these questions are obvious, but I really am a novice and keen to get it right from the beginning!
The Anchor Buddy is different than a typical rode because it stretches. It starts out at 14 foot, and at maximum stretch reaches 50 feet. The main consideration I have is if the wind blows or waves push the boat toward shore will the boat hit bottom. My anchoring situation is about as easy as it gets so my Anchor Buddy is almost never fully stretched to 50'.
So If you want to be certain drop your anchor far enough out so at the max of 50 feet of Anchor Buddy stretch the boat will still be held off shore. So with a max 50' length (perhaps more if you have chain), and the boat being 28 foot long, the anchor should be set somewhere around 80 feet from shore. The way to do this is to have an (for example) 85 foot stern line. Again slowly pull away from the shore until your stern is 85 feet from the shore, drop the anchor off the boat, or toss it a few feet out and your anchor will be in the correct spot. This does not allow for the anchor dragging while it gets set. You may have to experiment to get it right. Bottom conditions may alter this plan.
If your bottom is too deep to drop the anchor 80 feet from shore in heavy wind or wave conditions perhaps an Anchor Buddy won't be the correct choice for that day. I keep a 150' braided nylon line for less than calm anchoring conditions.
As I've said before anchoring is more of an art than a science. I've been boating for 50 years. The best thing I have going for me now is a sandy bottom and calm conditions. I've had a variety of anchors. All of them will fail to set depending on the bottom conditions. Some will work 90% of the time. A very popular anchor right now is the Mantus. I'm considering a 13# Mantus if it will fit in my boat. At 70 years old its becoming a bit much to haul up the 25# Richter
As I said the Anchor Buddy is good for daytime and needs to be monitored. If your anchor drags you want to be able to jump on the boat and take care of it.
The Anchor Buddy helps prevent the anchor from dragging because the elastic takes up the shock of the bow bobbing up and down which would otherwise be hard jerks on a solid anchor line.
Our anchoring situation is almost always relatively calm both in terms of wind and waves. I toss the Richter anchor out and it never moves. The depth is about 10-15 feet deep so my "scope" is from 1:1 to 5:1. Your situation may vary.
If I anchor in more windy or wavy conditions, especially if I'm anchoring overnight, I'll either replace the Anchor Buddy with a solid rode, or will put out a second anchor.
Over the years I've had two Anchor Buddy failures with the surgical tubing parting. That means I've lost the stretch and have a 50' line attached to the anchor. I won't have the shock absorbing effect. Since then I replace the Anchor Buddy every two years.