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    How often can you see the sunrise/sunset - PLEASE HELP?
    From: Mike L
    Date: 2007 Dec 5, 05:22 -0800

    For many years I have been searching for information on the
    probability of seeing the sun as it either hits or rises above the
    horizon.
    
    Whilst it seems incredible, as far as I can tell there is NO
    INFORMATION ON THIS SUBJECT either specifically for any location or
    generally for any particular location at any time of year.
    
    All I have been able to ascertain is that in one location (Paisly
    Scotland), the sun shines for roughly 30% of the day in summer and
    around 15% in winter.
    
    Unfortunately, I suspect the probability of seeing the sun is largely
    determined only by the altitude of the sun, and as the sunrise/sunset
    is always on the horizon, I suspect the probability of seeing the sun
    does not change significantly from summer to winter in a maritime
    climate like the UK.
    
    As I have been unable to find any hard data on the subject, I really
    could do with some "soft" information and those involved in navigation
    although not necessarily having taken a reading at sunset/sunrise,
    might be more aware of the sun shining and/or may have some records of
    some form even if it is the number of days on which a siting may be
    possible at a particular time.
    
    PLEASE HELP!
    
    Questions:-
    1. Is sunrise/set more visible at sea?
    2. Is navigation "visible"  related to meteological records of
    "sunshine"?
    3. How much does the probability of seeing the sunrise/set vary by
    location (even in the same climate?) E.g. are there places that
    irrespective of local geography have many more sights of sunrise/set?
    
    
    
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