Compare: SC2 & Sky Maps p.5

The SC002 best displays the stars near the north celestial pole. The below figure displays how the SC002 stars are distributed our sky. Note that the SC002 is mostly useful for displaying the stars in the northern sky, so I've rotated the sky map so it corresponds to a view north.

The blue lines are the hour circles; one for each hour of RA. All these hour circles go through the NCP, so in the above figure they seem to be radiating from the NCP. The purple lines are the diurnal circles out to dec=+30° (in steps of 15°). Note that almost all of SC002 stars are circumpolar stars: always above our Minnesota horizon. Some of the SC002 stars (those with decs less than +45° at the outer edge of the SC002) spend some time below the horizon.