The Observatory site is situated at an altitude of 2400 metres above sea-level. This height is not usually a problem and no medical examination is required for visiting observers. But if for any reason you think it might affect your physical condition, it would be advisable to check with your local doctor before coming out.

You are strongly advised to declare any more serious medical condition

to the Director of the ING before arranging your visit. Such conditions include respiratory or heart problems, epilepsy, diabetes, etc. With your permission he will ensure that the essential personnel are aware of the condition. Be assured that all medical matters are treated in strict confidence.

Note that at the altitude of the observatory the atmospheric pressure is approximately three quarters of sea-level pressure, similar to a pressurised aircraft cabin. This does have physiological effects. Therefore avoid as far as is possible driving between sea-level and site if you have a heavy head-cold; there have been cases of damaged eardrums caused by inability to equalise pressure. The effects of heavy colds, head and chest infections and sinus conditions can be greatly exacerbated on site. Avoid taking heavy exercise shortly after arriving on site. In case of an emergency contact ING's Leader of the Operations Team at daytime normal working times, or the Observing Support Assistant (OSA) at night. The IAC residence provides a 24-hour porter service who can also be contacted in case of an emergency.

In case of medical problems, for your own safety do not, under any circumstances, go to your room and lie down without first telling someone. If someone else tells you they feel unwell, make sure the ING's Leader of the Operations Team, the Observing Support Assistant (OSA) or the IAC residence's porter are informed.

E.U citizen should carry their European Health Insurance Card. Without this card you will be required to pay any doctor and hospital charges.

There is a First Aid room in the Observatory's residence and one in the INT building. First aid kits are also located in the JKT and WHT kitchens.

Note that the range of medicines available on site is extremely limited, since ING is not legally permitted to dispense medicines. This legal restriction includes non-prescription items such as aspirin, and visiting observers would be well-advised to bring their own supply.

Other items which visitors are advised to bring include lip-salve (the atmosphere on site can be extremely dry), sun shield (particularly for those who intend to do much walking on site) and travel-sickness tablets (for those who might be affected by the journey up and down the mountain road).