What type of anchor is best known for its holding power by plowing into bottom sediments?

The best choice is the plow-style anchor, which is designed specifically to dig into the bottom sediments when deployed. When the anchor is dropped, its shape allows it to penetrate the sea floor, creating a firm hold as it "plows" through the sediment. This unique design enables it to provide significant holding power in various types of substrates, such as mud, sand, or softer bottom materials, making it ideal for many boating circumstances.

On the other hand, the mushroom-style anchor, while effective in soft bottom conditions, relies on its weight and shape to resist being pulled from the sediment rather than actively digging in. Fluke-style anchors are designed for quick setting in sand and gravel but do not plow into the bottom. Drum anchors, typically used for mooring and not as a primary anchoring device, operate differently and are not intended to provide the same kind of holding power through digging into the bottom. This understanding demonstrates why the plow-style anchor is often favored for its reliable and robust holding characteristics.