i have two makes of night vision,my preferred one is a Yukon tracker but as that is on the blink(waiting for Thomas Jacks to reply about repair),i used a Dipol D3MK,always take one when working the ground as you can see exactly where to set,so no wasted drops,since night vision became available it has alway's been my way to take it with me,but i do not see it as a substitute for good field craft more an addition to good field craft,i would not solely rely on it because should it stop functioning you can still work the ground if you have the field craft or knowing ( as my grandfather used to sa