One of the most useful pieces of gear on the boat. Right up there with the vhf and the binoculars. Mine is a mono scope. (Not the same one as the one in your picture but close! and I don't need a litter box.) It is water proof and floats. It is even bright yellow! It is about 10 years old. Still does what I need. Don't leave port without it. It turns night into day! Love it! It cost less than $200.00! I just looked at the ones available today. Yikes!
Got three of the Mark I versions at home but they are hazardous to use with the scratchy extremities.
However, I am amazed at how well a good pair of 7X50 binocs work as night vision glasses and it isn't too surprising considering that the 50 mm lens is considerably larger than the human eye lens so gathers a lot more light. They do not require batteries.
Military taught me to repair them. Infra red, least useful, cheap. starlights, how much money do you want to spend, first generation second or third, goggles, rifle sight or bigger crue served. A thousand dollars all the way up to oh xxxx.