* '''Toilet:''' through the first door on the left as you enter the dome. The light switch is outside the door on the right. (Don't be alarmed if you discover that these facilities are occupied during the night; the neighbouring IRSF does not have its own toilet.)
* '''Kitchen:''' located beyond the staircase on the right. It has recently been refurbished and has a sink with running water, a microwave, coffee maker, kettle, toaster, snackwich and an array of cutlery and cheerful crockery. There are jars of teas, coffees, hot chocolate, sugar and creamer. If these jars become empty, return them to the hostel kitchen in your night lunch bag for refilling. The kitchenware is cleaned daily by the hostel staff, except at weekends.
=== Upstairs light switches ===
* '''Light switches on the left at the top of the stairs.''' One is for the stairwell lights; the other for the observing floor incandescents.
* The '''switch for observing floor fluorescent lights''' is located inside the small door facing the stairs, next to the controls for the air conditioning.
* The '''switch for upper dome fluorescent lights''' is on the grey Observing Floor Control Panel on the wall by the North pier.
=== The Observing Floor ===