A tour of the Caribbean on a luxury yacht by Prince Charles and the Duchess of Cornwall will aim to be ecologically friendly, Clarence House has said.
Prince Charles and Camilla are expected to have a busy schedule
Officials said this mode of transport would be cheaper than flying and better for the environment.
It said March's visit would "reinforce Britain's ties" with Trinidad and Tobago, St Lucia and Jamaica and the UK Overseas Territory of Montserrat.
The couple will arrive in the region on 4 March and stay for 11 days.
They are set to sail around the region, visiting a number of countries on a vessel hired from British businessman Sir Donald Gosling, called the Leander.
A Clarence House spokeswoman said the visit "will advance key British government priorities in the promotion of sustainable development, environmental protection and youth opportunity".
Reduced carbon emissions
Using the Leander, rather than a plane, to travel between the islands is expected to reduce climate change pollutants.
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A saving of about 40% in carbon emissions, compared to the Prince's last Caribbean tour in 2000 when he flew, is expected.
Seems like a nice holiday at Taxpayers expense. If they want to do this they should pay for it.
And, in a further effort to reduce emissions and costs, Charles and Camilla will fly to and from the Caribbean by a scheduled service.
The 246ft-long yacht, which has a crew of 24, has a jacuzzi deck, bar, gym and sauna, and accommodation which includes two master suite cabins, three en-suite double guest cabins and five twin guest cabins.