Below - Click on the city nearest you to see a great circle map centered on that city.

Below - Great circle map centered on Mellish Reef.

World Map generated by

 "VQLog" by Gabriel Sampol EA6VQ  http://www.vqlog.com 

Great Circle maps generated by

 "Great Circle Maps for Windows" Ver 2.3 by Roger SM3GSJ http://hem.passagen.se/sm3gsj

Reference co-ordinates for maps taken from "The Times Atlas of the World"