The navigation is MAG-1 which is the
digital assistant system for manual moving..
More quicker than any motorized navigator such as the SKY SENSOR 2000 .
You must be careful not to forget to push arrange key when you get the target in the center of the field .Otherwise the amount of error will increase bit by bit .
There are 2 water leveling gage ;one
on the mounting and the other is on the binocular .
Using the levels and 2 stars in the sky ,the setting will be completed .
The original navi can hold a square type battery
006p type (9V) inside of it but will spend out them within a night .
So I prepare 6 batteries (UM3 type) inside of the mounting .These batteries keeps power for few days .