Heard Island and McDonald Islands Travel Adapters

Heard Island and McDonald Islands are a remote Australian external territory located in the southern Indian Ocean about halfway between Madagascar and Antarctica. The islands are uninhabited and consist largely of glaciers, volcanic landscapes, and protected wildlife habitats. Heard Island is dominated by Big Ben, an active volcanic massif that includes Mawson Peak, the highest point on Australian territory outside the mainland.

Heard Island and McDonald Islands do not have a public electrical grid. The islands are uninhabited and have no permanent infrastructure. Temporary scientific expeditions bring their own portable power sources and equipment when visits occur.

The electrical system used for Australian-administered installations operates at 230 volts with a frequency of 50 hertz.

Type I

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Adapter types are listed because they have been found or specified for use in Heard Island and McDonald Islands under Australian administration. No plug type is excluded due to age, rarity, partial use, or declining presence.