Re: Advise on Weight & Type of Anchor for Islander 37
80 feet of rode is only sufficient in a storm condition if you are in 1 inch of water with no freeboard.
10:1, including freeboard is the minimum I would use for a storm (and figure tide and surge predictions as well).
You and your cerebral friend got lucky you only lost an anchor.
Your Islander has lots of reserve buoyancy in the bow, and ground tackle is your primary insurance (the actual insurance is the last resort). 45 pounds of primary good anchor - and 100 feet of chain with 100 feet of rode would be my suggestion.
If you don't have a windlass you can carry a secondary (the danforth you have) with minimal chain and 100 feet of rope as a lunch hook from when you are lazy, or no wind is expected. That's also a good stern anchor to drop when needed.
Lessons learned are opportunities earned.