Boat anchors are essential equipment for any vessel, as they provide stability and security by holding the boat in place. There are various types of boat anchors, each designed for specific conditions and seabed compositions. Here are some common types:

1. Fluke Anchor (Danforth): This is one of the most popular types of anchors, especially for small to medium-sized boats. It has two broad, flat triangular flukes attached to a shank. Fluke anchors work well in sandy or muddy bottoms and offer good holding power.
2. Plow Anchor: Resembling the shape of a plow, hence the name, these anchors are effective in a variety of seabeds, including mud, sand, and gravel. They have a single large fluke attached to a shank, with a roll bar to help the anchor set properly.
3. Grapnel Anchor: Grapnel anchors have multiple tines or hooks that can grab onto rocks, reefs, or other underwater structures. They are commonly used for small boats, dinghies, or as a secondary anchor.
4. Bruce Anchor: Also known as a Claw anchor, the Bruce anchor has a three-fluke design resembling a claw. It's efficient in a variety of seabeds and offers good holding power. Bruce anchors are popular among recreational boaters and are often used as primary anchors on small to medium-sized vessels.
5. Delta Anchor: Similar in design to the Bruce anchor, the Delta anchor has a weighted triangular shape with a single penetrating point. It offers quick setting and reliable holding power in various seabeds.
6. Naval or Admiralty Anchor: These are large, heavy anchors often seen on large ships and naval vessels. They have multiple flukes and are designed for maximum holding power in challenging conditions.

When choosing an anchor for a boat, factors such as boat size, windage, seabed type, and typical weather conditions in the area of operation should be considered. It's also important to have an adequate length of anchor line or chain to ensure proper anchoring and to account for changes in tide or weather. Regular inspection and maintenance of the anchor and its components are crucial for safe and effective anchoring.