I don't mind at all. I derailed the thread. Thank you for getting me back on topic. I'm actually thankful you are willing to help.
To answer your questions:
1) End use will be exploration.
2) Operating environment will be saltwater 100% of the time after the project is completed. I do have access to the University pool before then. I am not adverse however to modifying the ROV's motors after the assignment as been completed. The T-100 Thrusters while nice, might eat up half the funds my professor is willing to give me to help fund the project.
3) Looked up on the NOAA site, they state the average tidal current is 0.7 as per 2011.
4) The platform size I'm still debating on. 20"x 20"x15" seems like a manageable size constraint to me.
I completely forgot to list about cameras and lights, though they appear on my list I've written in my notebook. The water in this area is really dark, so I imagine I will need some powerful lights and have just started to look at options. Buying Off the shelf, or building my own assembly.
Thank you for listing the compass and depth module.
I have to remind myself that this is a school project and it is my first time. I've experienced scope creep already and have to keep removing bells and whistles I want to add. If anything to keep it easy for the control box. Less things to display / program.