Map of the OH maser spots respect the reference coordinates. The (0,0) location corresponds to α = 19:10:13.2091, δ = 09:06:12.485 (J2000). Respectively, the dark and light blue circles represent the 1667 MHz LCP and RCP maser spots; green and yellow is for 1665 MHz LCP and RCP; and orange and red circles for 1612 MHz LCP and RCP. The crosses indicate the locations of HII regions, reported by De Pree etal. (1997), with the corresponding letters used to refer to each of them. The square that overplots to the cross, which represents G1, corresponds to the location of the centre of the bipolar outflow of Gwinn et al. (1992).