It’s just a vehicle I’m aware exists - Blue Atlas have designed it by themselves, and don’t seem to have shared the designs for it openly, so you could make your own design using some of the elements of their design to influence yours, but to ‘modify’ their design you would need to first fully reproduce it yourself.
The depth rating is determined by the components you use (enclosures will likely be the most relevant), and as above the speed
That may be somewhat challenging and/or expensive for you to implement. Depends how much you’re wanting to do yourself, and whether your budget is pre-defined or if the features you want are being used to drive the eventual product cost.
Our Low Light HD USB Camera is 1080p, but we’re also currently evaluating some different 4k options. There are also some potentially relevant options linked here.
If it’s relevant you’re welcome to share additional information in private (via direct messages in the forum by clicking someone’s username, or via email), but the tradeoff to doing so is losing access to the eyes and voices of the general community, who may otherwise have helpful suggestions.
Up to you how you choose to continue discussions (and it’s of course possible to have multiple discussions ongoing in different places).