Satellite system of M 81 in Cartesian supergalactic coordinates, shifted to the center of the satellite distribution. The dSphs are indicated as dark gray dots, the dIrr as squares in a lighter gray, and the main galaxies M 81 and M 82 as white stars. The thin black lines indicate the distance uncertainties. The top panels represent an edge-on view of the plane, and the bottom panels show a face-on view. In the bottom right panel, the velocities are indicated as thick lines, as well as the color. Red indicates galaxies moving away from us with respect to the mean velocity of the system, and blue indicates galaxies moving toward us. The color-coding is the same as in Fig. 5.