One note regarding the editorializing in the linked article.
The article states, "The Coast Guard, which has routinely ignored past NTSB safety recommendations, said earlier this year it would make some of the suggested changes."
The relative clause in that sentence is blatantly false.
The Coast Guard often disagrees with NTSB safety recommendations, usually because they doubt the practicality, effectiveness, cost -benefit ratio, or applicability to regulated entities. However, there is nothing "routine" about the decision not to implement an NTSB recommendation, and the recommendations are never "ignored."
The Coast Guard goes through every single recommendation of every NTSB report pertaining to matters under its jurisdiction and goes on record as to which ones it is implementing as recommended, which ones it is implementing in part, which ones it is not implementing and why.
The NTSB operates from a privileged position. It chooses which mishaps it investigates, and it has no responsibility for what happens after their reports are published. Their reports often include more than a little bit of posturing and advocacy. They have the luxury of being able to recommend completely impractical solutions, then stand back and wag their fingers when the operating agencies who have to do the hard work or writing and building consensus for useful regulations don't do everything they suggest.
The NTSB has an important role as an independent fact finder. I'm glad they exist. But it is simplistic to treat their recommendations as the last word on anything.