I have one last not-so-critical issue with Ocean Hunter that I'm pretty sure most people have also noticed as well. It concerns the final level's second miniboss, known as "Umi-Bozu." Umi-Bozu is a huge octopus that can literally turn completely invisible for several seconds when it's not stationary. The issue with Umi-Bozu is that it's invisibility mode seems to be severely broken, in that around 50 to 55 percent of Umi-Bozu's body remains opaque. I'm currently running the latest available build of Supermodel(SVN r601) through the latest version of Emuloader(8.2.9). If this issue gets fixed, then the emulation of Ocean Hunter will finally be 100% accurate.
Below is a link to a gameplay video that was recorded straight from the Model 3 PCB, which shows how it's supposed to look:https://www.youtube.com/watch?v=WmGFI-H03LA
(30:47 to 30:52 is when Umi-Bozu turns completely invisible and then visible again for the first time.)
And here is a screenshot showing how it currently looks: