Map of the observed points in the blind survey in the Galactic plane. The green, red, and black open circles correspond to observations with the first, second, and third setups, respectively. The size of the symbols is constant and not representative of the radiotelescope beam, which is elongated in declination and increases with declination (thus roughly with longitude). The inner rectangle encloses the region of the nominal survey. Regions below l = 70° are poorly covered because of oversubscription of the radiotelescope time at lower longitudes.