A bracket-mounted portable control, which contains a hoist and microphone switch, is located at the communication station to the left of the cargo door (Figure 1-10-2). The switch is of the momentarycontact type with marked positions “HOIST UP”, “ICS” and “HOIST DOWN”. Intercommunication transmissions are possible in all three positions by applying right side pressure to the switch. When released, the switch returns to its centre ICS position.