Abstract: An embodiment of an apparatus includes first and second tracking units configured for mounting to an endovascular device, and respectively configured to generate a first magnetic field along a first dimension and a second magnetic field along a second dimension that is approximately orthogonal to the first dimension. And an embodiment of an endovascular device includes a body and first and second tracking units. The body is configured for insertion into a lifeform. The first tracking unit is disposed at a first location of the body and includes a first coil configured to generate a first signal related to the first location in response to a first magnetic field. And the second tracking unit is disposed at a second location of the body and includes a second coil configured to generate a second signal related to the second location in response to a second magnetic field.