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You will need an american adapter as the destiny used to be american ship in an early life.
Just got back from Destiny last week, the plug in cabins are 110v and need flat pin plug, some ladies complained they didnt work too well due to the low voltage. There are also plugs in corridors which you can use, which I think were higher voltage.
If you have any further questions please ask...
The plugs in the corridors are 2 pin continental, I think they are 220V. I have seen others using hairdriers in the corridors.