If I remember right (haven’t been down there for a few years), the sky-scanning person is also female; presumably another nurse looking for the desperately needed Dust-off.
Which is all absolute horsehockey: there were no women medics in the field in Vietnam. That sculpture is total fantasy for the women's groups.
All of the truly heroic "looking for a dustoff/medevac" was done by medics and corpsmen with the combat forces.
Damn thing has irritated me since it was put there.