On one occasion it was found that the web pages from the ING could not be accessed. In fact, various of the applications provided on our `Observing Tools' are actually links to ING pages. This includes things like `Visibility Plots' which are rather convenient to use during the night. It should be checked if (all of) the applications that are linked from the ING can be installed on our own computer system such that any (local) break in the Internet does no unduly affect observing.