sailing/boating at night...need help with school project!!

I'm currently a high school student, and I need your help for a class project. Any help would be TREMENDOUSLY appreciated!

I'm trying to find out how often people use their boats/yachts in the dark.
If so, how do you manage navigating/docking in the dark? Do you rely on high-tech devices (e.g. radar, thermal imaging, gps...)?
If not, what's keeping you from going out at night?

If there was a device for boats (night vision, thermal imaging) that is available at a very low price, would you consider using it for night time sailing? Can you think of instances during sailing where the ability to see in the dark would be very helpful?

Any other suggestions/comments would be very helpful. Thank you so much everyone!