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Hello and welcome to the CMS Guide, online course, for Safety! Today, you will learn the safety rules for guiding visitors at CMS, Point 5.

Before the visit, the group should have received an email with all necessary safety information. Let's just review it:
Only closed shoes are allowed underground - no high heels or sandals.
Visitors with medical implants, sensitive to magnetic field, such as a pacemaker or a hearing-aid cannot visit the underground when the CMS magnet is on.
No children under 8.
Pregnant women should let CERN know in advance, due to complications in case of evacuation.
Any other special conditions concerning the visitor’s health should be communicated in advance.

For guiding a visit, you should be wearing your Personal Protective Equipment (PPE). Remember this check-list in 5 steps:
1. Helmet with lamp.
2. Highly visible white vest for guides, so that other people recognize you as a guide.
3. CERN mobile phone (available in the Control Room), so you can be reached.
4. CERN Card and personal dosimeter (or token) visible.
5. Anf safety shoes.
When the visitors arrive, distribute the visitor badges and don’t forget to collect them after the visit. Make sure your group has no more than 12 people, when going underground. Count your visitors regularly. Count your visitors re-gu-lar-ly. Before starting the tour, announce to the group that the visitors should stay together and remain within the authorized areas. Remember that only two groups of visitors are allowed underground at the same time, and only one in the experimental cavern.

Your visit may include both the surface buildings and the underground caverns. Please make sure that your visit does not disturb the ongoing work and that your visitors respect the barriers. There is no access to areas involving such hazards: ODH, lasers, highly-flammable or toxic gases, high-voltage, etc.
There is no strict order to be followed. However, here are the main surface points you may show to your visitors:
The Peter Sharp Room;
The Assembly Hall - SX5;
The Blue Area - SDX5;
The Elevator Shaft – The MAD Hall in SDX5;
The Control Room;
The Collaboration Space (or Coffee area);
And outdoor, The LHC dipoles.

On the way to the underground cavern, you must brief the visitors that they should follow you at all times and that the elevator will be used in case of an evacuation. Inform the visitors that the emergency phone number is displayed on the back of their badges.
Underground, the visitor access is limited to level -1 and -2 only. We suggest that you start your visit at -2. Here are the most important stops:
Starting in the service cavern:
At level -2:
the PM54 shaft view from under, historical posters and the underground mock-up;
Then, the counting room (and racks);
And finally, LHC posters and the red safety cabinet;
In the Experimental cavern – on the visitor’s balcony - you can show the actual detector!
Depending on the operation status of the LHC, there might be no access to the experimental cavern - ask the shifter when in doubt.
Back in the service cavern, at level -1, two more places:
the Old Control Room – where the 3D Video is;
And finally, the second counting room (and racks again).

Make yourself familiar with the position of the safety equipment, such as fire extinguishers, first aid cabinets, defibrillators, red phones, red cabinets and evacuation buttons.
In case you observe an imminent danger to either a visitor, or a worker, you have to use the green evacuation buttonand evacuate calmly.
In case a visitor feels sick, you should interrupt the visit immediately and let the Fire Brigade know, if help is needed.