This is an automatically translated description

From the publisher:

HOW TO USE THE MOVING STARGAZER

1. Rotate the circle on the map so that the date of observation on the outer circle of the map coincides with the hour of observation on the outer circle of the circle. Then only those stars that are currently above the horizon will be visible in the circle hole. Orient the map above your head relative to the sides of the horizon. In the centre of the circular hole, you will see the stars that are located near the zenith, and near the edge - those luminaries that are located near the horizon, that is, rising or setting.

3. The culmination of the star occurs when the luminary crosses the plane of the meridian - on the map it is a line running from north to south. At the moment of the upper culmination, the star is located highest above the horizon, and at the lower culmination - lowest. Attention: The outer circle of the circle indicates the local time of the observation site. The difference between the local and Kyiv time for the regional centres of Ukraine is shown in Table 5 of the appendix in the textbook "Astronomy" for grade 11, author M. P. Pryshlyak.