Since ski jumpers fly NORDO, authorities have issued the following NOTAMs:

US:
http://www.faa.gov/air_traffic/publi...ial_notice.pdf
http://www.faa.gov/air_traffic/publi.../2010_olympic/

Canada:
"AIP CANADA (ICAO) SUPPLEMENT 37/09" section of:
http://www.navcanada.ca/ContentDefin...ip_sup_eng.pdf