I hadn't remembered Maggie knowing about boats and engines in quite such detail, and I'm wondering exactly how she acquired that knowledge. The particular aspect of it that bothers me is that Joe didn't know that she was knowledgeable. That surprises me. But maybe he's been concentrating on Carolyn so much that he forgot.
I experienced this as a repeat of an earlier scene, maybe weeks ago, where Maggie rattled off the same info., and surprised Joe in exactly the same way. This is viewing #2 for all this, though. Maybe I remember seeing this months ago. It did seem odd that she'd know all that, without having a father as a sailor, or without working amongst boats herself.
I liked that they were cutting from one locale to another, showing them dealing with the storm. I never notice DS storms usually. The thunder's just in the background, like a laugh track. Here, the storm is a bit of an event that affects different people in different ways.