Simon Chapman said on 25/3/2003: >"Maximum operating altitude: 3000 m (10,000 feet)" > >Presumably this means that we're voiding our warranty if we use it on a >plane... I don't think so: Cabin pressure in planes (at least in commercial planes) is kept to a equivalent of 8,000 feet or less: <http://books.nap.edu/books/0309082897/html/311.htm> <http://digilander.libero.it/andreatheone/7.htm> <http://askvrd.org/askateacher/knowledgedb.asp?cat=517&ques=1167> -- Javier Pedreira "Wicho" <wicho at casaciencias.org> Museos científicos Coruñeses (=mc2) <http://www.casaciencias.org/> La Coruña, Spain 43°23'N 8°24'W