Hi SL,
I'm instantly interested by the title, so I've taken a look - but I don't profess to be an expert!
I love the opening few words - Lightning crackles through the night sky. Such a vivid description and describing dramatic conditions like that really sets up the volatile situation.
Show vs Telling
Mostly really good, I think the main example that I picked out was "A panicked man rushes across the deck". Maybe describe his facial expression, and demonstrate his panicking by his words/actions?
Too much detail vs too little details
I thought this balance improved as the chapter went on. This might just be personal preference, but one or two of the clothing descriptions took me out of the story a little. It might be because I tend to try and only describe clothing at a time when it would be appropriate for the character to notice it, and in the lead up to battle wouldn't be it. But on the other hand, I totally get you want to make the characters stand out so the reader remembers who they are.
To me there doesn't seem any moments where there was too little detail, some of your descriptions later in the chapter are really good.
Flow of the action scenes
Again I liked these a lot. The only thing I'm not sure helps is that the POV seems to switch a few times which can be quite jarring. But it might be intentional, I'm not sure.
Overall I really enjoyed it, it's a strong opening especially as you've chosen to open the story with action. As I say I'm not an expert but those were some of my thoughts while reading. I'm sure the next chapters will be interesting!