Everything that's pre-recorded is in High German. Sometimes you hear Swiss German on the train when it's the driver/ticket inspector doing an impromptu announcement about (for example) the reasons for a delay, or telling people to stop blocking the doors.
Yep. Almost always "schriftdüütsch" ie spoken as it would be written ie high german.
Nowadays most of the radio stations are in Swiss german, although the news is generally high german on the national channels.
Swiss Air went bust a few years ago, so I wouldnt recommend flying with them. Swiss is owned by Lufthansa... the captain and copilot might speak Swiss german for more casual annoucements (eg world cups score during the world cup...), or High german with an horrendous French accent
usually any public announcement like on airplanes, trains,.... will be in high german.
Also most of the written stuff as swiss german is actually not a written language. You will find some written swiss german now and then but I think there are no set rules to that.
theoretically yes... practicality and ease of doing so... not so easy... I've been taking A1 German class since August, all the other students are from the corners of the earth and trying to practice with them during class is brain exploding... trying to make out what that gal from China is trying to say is way harder than chatting up the dudes from Bern and Basel, it's so much easier understanding them. I had been practicing for several years using audio cd's (Pimsler, Collins etc.) before coming here... and speaking with my wife and German friends. We get here and I'm told that my German is so much improved and I'm speaking well by family and friends... the instructor of the course says I am at a speaking level way above the A1 and should enroll in the A1 advanced or an A2 program... for financial and childcare and time of day reasons, I had to stick with this course... a few weeks of this 1000 chf course and my head has exploded and I can barley speak any more... I have all that crap accent from the other students rolling around in my head... then add to that all the Swiss Mund Art I hear around Chur, rolling r's on the tongue when in German it's in the throat. I have downloaded Ankidroid flashcards, practice those and listen to the audio cd's when I have a few minutes free, as doing all the house chores and taking care of a kid, does not allow much free time... if I had my druthers, I choose to learn Chur deutsch, and talk in English if the person I'm talking to doesn't understand Chur deutsch and I don't understand their accent.
I'm not sure, but I can assure you, I've lived in Switzerland for three years, taken Geman courses from level 0 to A2 ..wich I was told it is quite average and would allow you to get a slight idea of what is oing on...and when my son's school stills sending these letters with mixed words in German and Swiss German, I honestly can o ballistic!! I'm not sure if its worth all my effort trying to learn German, of when I go outside, all I hear is "dialect" even I the radios!
A) official language is Standard German and NOT one of the dialects, and so, public announcements by railways or trams or on Swiss Int'l Airlines flights of course are done in Standard language
B) anything in writing is in Standard German.
C) reverends in the churches of the City of Zürich, and since a certain moment of this year also in the outer suburbs, speak in Standard German during the service
No, most Swiss Int'l Airlines personnel canNOT have a French accent as they of course are NOT French speakers. But practically no announcements are done in dialect. And the High German of most Romands on board, usually out of Geneva, is quite good and NOT horrendous (exceptions DO occur ) .
the flight attendants on Swiss Air flights will speak whatever language they think you speak, assuming that you can speak German, French, Italian or English. the announcements from the cockpit will depend upon the flight, generally you will get German and French and on flights in and out of the US you will likely also get English.