Ashton,
I agree the McArthur HAT looks good as it solves the pi shutdown challenge and handles N2k connectivity and the Pi5 looks good too, better performance and it takes the NVME (SSD) hat - definately looks worth investigating.
We raced round rangi and rakino yesterday (sunday) in the RYC closing regatta, very challenging conditions, a broach and and knockdown in those savage squalls and our no2 gave up and disintegrated heading back up the harbour to westhaven, we crossed the finish line on main only and got first on line!
Got a nice graph from a fellow competitor showing