# Check the observing floor and '''clear any obstacles''' (e.g. ladders) that may obstruct the telescope.
# '''Switch off the [[#Light switches|lights]]''' everywhere except in the warm room.
In the warm room, '''on the wall-mounted control panel ''' at the left-hand end of the desk:
# Switch '''telescope power on''' (press and hold the green power button)
# Turn '''TCS lockout off''' (turn knob anticlockwise)
'''On the TCS:'''
# '''Request TCS control''' by clicking the grey "FLOOR" button. It will turn blue and say "TCS".
# '''Open the dome shutters''' by clicking the "DOME" pulldown menu and selecting "Shutter OPEN". The dome indicator on the top right will turn green.