Apparently no one told them that it's no bueno. (Free Spanish lesson. You're welcome.) If someone had, then maybe they might have been more careful. They might have had a different outcome. But where can one learn this kind of wisdom? Where can you go to understand what not to do?

then?

Let me ask you a question. Why would you train anywhere other than where you would be performing the job? Pools are really nice; in fact I was in a pool last night. But I was teaching open water newbies, NOT people that need to be bringing their A-game at the worst times in the worst conditions! We need to get away from this mentality of trusting an instructor because they have a card that says they can teach a class. Take the time to interview someone who is going to train your department. Ask them what their experience is. I don't care how many people you have taught, I want to know how long you have been doing recoveries and what kind of cases you have worked on. Tell me stories and some of your mistakes you have made.
Tell me why you teach what you teach! Are you doing this because it's a good gig and the money is good, or are you doing this because you want to bring the very best training to those that serve our community's? It is OK to ask these questions! If someone is going to get all defensive because you are challenging there credibility, then something is wrong.
So to sum this whole thing up in two words...be annoying. Ask questions, do your research, and don't condemn you and your team to failing before the class even starts. Write down what you want to accomplish, and every question you can think of before you interview a potential instructor. Then get at it!
Search negatively my friends!