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| Setting up a GPS monument at the 'HELZ' site. |
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| Emily Desmarais using GPS to map some of the Erebus fumaroles. |
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| Jean Wardell and Noel Barstow installing a GPS antenna at the lower Erebus hut. |
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| Bjorn Johns drilling a hole for a GPS monument. |
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| A Trimble GPS unit that Jean Wardell used to precisely track her gas sampling flight through the Erebus plume. |
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| Emily Desmarais using a Trimble GPS to map some of the Erebus ice towers. |
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| Phil Kyle and Chuck Kurnik installing a GPS monument at 'EAST'. |
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| Emily Desmarais using a Trimble GPS and a skidoo to map some of the ice towers in the summit region of Mt. Erebus. |
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| Beth Bartel and Phil Kyle installing a GPS monument on the caldera rim of Mt. Erebus. |
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| Beth Bartel installing a GPS monument at Abbott Peak (Mt. Bird in the background). |
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