United Kingdom
6d Aerogramme Posted at Sea

This aerogramme was written aboard S/S Southern Cross when "nearing Fiji". As she sailed under British flag, it was allowed to use British stamps and postal stationery for posting abord. When calling at the first port of a country, the postal items were transferred  to the local postal authorities and h/s "PAQUEBOT". The item above was fed into the postal network at Suva, Fiji (cds 8 Jan 66).

According to Wikipedia S/S Southern Cross sailed on the Great Britain to Australia route. Taking 76 days for one circumnavigation, she sailed from Southampton to Cape Town, from there to Australia and New Zealand, and then continuing eastwards across the Pacific to Europe via the Panama canal. Normally she made four such circumnavigations every year.