| This is a link to the previous page of the current page. This not in every case the page where you was before. |
| This is a link to the next page of the current page. |
| This is a link to the GEO 600 Homepage. |
| You will see THIS helppage if you click here. |
| You will see some additional information of the current page if you click on this symbol. For example you can see who has designed the current page and who will do some changes here. |