Stern anchor suggestions
As mentioned, it is all about intended use and type of bottom. One caution about the Fortress. We have found they need extra care in setting. As an emergency hook (the first use listed), they may not be the best as they tend to "sail" along the bottom unless you are nearly stopped. That said, once set in the type bottom Danforth style anchors like (sand or mud), they hold very well. We were hanging on a Danforth 12H with maybe 6'' of chain and 1/2" rode once in a 36'' boat when a 40'' steel ketch dragged into us at 3 am. It was blowing maybe 25 knots so not that bad. They had a 45# CQR and hundreds of feet of chain. Hard mud bottom. We tied them on and our toy setup held us both the rest of the night. Suspect people sometimes rely on hardware like lots of chain in place of a little care in setting. The difficulty for a stern emergency setup is the time for a careful set may not be available.