You know Joe, I have used everything from a 220 grit coarse edge to 2000 grit refined. I like the coarse edge for some cleaning tasks and the more refined edge for others. I am actually experimenting with different edges on this and my fillet knife right now Trying to find a good middle of the road finish that will give me a balanced performance. I'm playing with some finishes in the 600-1000 range right now and am pleased with the results I'm getting so far.
These steels have good bite even at higher grits. I don't clean and filet many fish any more and when I did they were smaller freshwater types. The biggest were Pike and catfish. Practically panfish compared to some you pull in.
I use my knives mostly on tape, cardboard, some things from para cord up to manilla rope and nylon rope topping out at maybe an inch, but mostly less. Food I occasionally cut when it's frozen and I get fairly fat free stuff so more times than not I can get away with probably 200 grit and above. The most I used to regularly sharpen to was 8k but it's been a few years since I've done that. Just don't have the need any more. I like the biting feel of the lower grits with medium to high carbide steels. Super Blue isn't a real high carbide steel but it's just plain fun to sharpen.
The first time I sharpened one of Phil's knives I was amazed how easy it is due to the geometry. You just need fresh steel basically and that takes a minute or two once the edge you want is established. Monster steels like S110V at rc 63.5 is easier than some 440C knives I've had to sharpen but that's mostly because I was removing steel to make the edge sharper than a marble. The Cruwear knife from him is a dream to use and sharpen. It really brings out the performance of the steel cutting wise. No batoning though. I'll leave that to Phil as he's running tests on new steels.
Everything from the size, geometry, to the steel choice makes that an excellent knife for what you are doing. Make sure your lanyard stays anchored to you or the kayak when out though. Imagine the feeling you would have giving that one up to the ocean. I cringe thinking about it.
Joe