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[TSL] Ship off course
Denis McCarthy <denismc@optusnet.com.au> on 03/03/2010

Hello Graeme,  The ship would have been well on course following and its 
great circle route. The great circle distance is the shortest distance 
between two points on the Earths surface assuming the Earth is a sphere, 
and from England to Australia this route runs in an arc close to the 
Brazilian coast  across south of the Cape of Good Hope into the Southern 
Ocean to Australia. In early periods provisioning calls were made at 
South American ports.. Favourable weathers patterns and currents were 
also an advantage on this route. The First Fleet called at Rio de 
Janiero. Pushing a barrow, I remember learning this in primary school 
history in the 1950's. A good visual example of the great circle 
distance is the course followed by an aircraft fyling from New York to 
the UK.
Regards Denis McCarthy Qld Australia
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