Calculate & draw maps of Great-Circle routes    .

Far more to airline great circle routes than one might expect (as one might
expect :-) ).
Find out eg what ETOPS- 330 means, why you might care and how many aircraft
can achieve it. (NZ - South America direct anyone?)

Great Circle Mapper

        http://gc.kls2.com/

    FAQ - ETOPS stuff and much more

        http://gc.kls2.com/faq.html

Airport Codes
Can be used with Great Circle Mapper
From mapping.com

        http://www.mapping.com/airportcodes.html


Online Map Creation

        http://www.aquarius.geomar.de/omc/





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again, once or on numerous occasions in future, but in less controlled
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