mickurley
New member
HELP! I know what GMT is and what BST is I think UTC = GMT but what is UT!!!!!!!!!!!
Thanks in anticipation Mick.
Thanks in anticipation Mick.
Time Zones
- Thread starter mickurley
- Start date
G
Guest
Guest
ut = gmt
LadyInBed
Well-known member
Universal Time Co-ordinate - nm
Piers
Well-known member
UT is the 'modern' replacement of GMT, and is often written with the designation Z. Hence, 0825Z would indicate 8:25am UT time.
As far as boating is concerned, GMT, UT, UCT, UT1 and so on, are the same since they are within a second or so of one another, the most accurate being UTC which is to a billionth of second a day.
These different timings have arisen since it is neccessary in some sciences to know time under slightly different circumstances - rather like the argument of different chart datums - WGS84, OSGB1936 etc).
Have a look at,
http://aa.usno.navy.mil/faq/docs/UT.html
http://www.maybeck.com/ztime/
Piers du Pré
MBM Cruising Club enthusiast
www.dupre.co.uk/fsPlaydeau.htm
As far as boating is concerned, GMT, UT, UCT, UT1 and so on, are the same since they are within a second or so of one another, the most accurate being UTC which is to a billionth of second a day.
These different timings have arisen since it is neccessary in some sciences to know time under slightly different circumstances - rather like the argument of different chart datums - WGS84, OSGB1936 etc).
Have a look at,
http://aa.usno.navy.mil/faq/docs/UT.html
http://www.maybeck.com/ztime/
Piers du Pré
MBM Cruising Club enthusiast
www.dupre.co.uk/fsPlaydeau.htm