Capt.Bill11
Guru
Check out Amazon for their boroscope or endoscope which is simply a tiny camera in a brass housing at the end of a long USB cable. Plug the USB cable into your laptop and fish the camera end wherever you want to see. The camera end has a few LED's to light up the area around the camera in darkness.
Range in cost from $15-$30 for up to 20' length. Good to go exploring all over a boat. They are waterproof so you can tape it to a boathook and check out your prop / rudder, and even bilge areas.
Fiber optic cameras are far more expensive due to the fiber bundle accuracy. Also, they are length restricted since you get loss by the foot.
Stu
What you mention is what I was talking about. Just used the wrong term in a generic way.