Re: What is a good spotlight for night tme navigation?
If by "back to the dock" you mean "I need to illuminate the dock while pulling in", any handheld will work. I use a $10.00 rechargable 1,000,000 candlepower light I got at lowes.
If you are a mile away and need the light to "navigate", you don't the water well enough to be out after dark. When you are boating at night, keep your nav lights on (green/red up front, 360 deg stern light), let your eyes adjust to the light you have and proceed slowly. If you need to identify a landmark to get your bearings, stop, pull out the spotlight and scan the surface (being carful not to point the light toward any other vessels). Turn it off and proceed slowly again. In NC at least it is illegal to use the light underway.
Edit: I see this was pretty much covered while I was composing my reply