Check out any shooting supply or gun store. They have various optical and
laser range finders.

"Marc Auslander" wrote in message
...
I'm often unsure about how far I am from other objects in an anchorage
- other boats - other hazards - etc. I wish there was a device that
would measure ranges in the 50-1000 ft range. Not something that
depends on knowing the size of the object being viewed, of course.
But rather an optical or electronic gadget.
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