if it requires amazing technical finesse let's hope they sucessfuly converted from english to metric...

They're not too worried about missing the Moon. Cassini's been around long enough that english-to-metric units aren't a problem anymore. A sand-gain-sized ice crystal in the spacecraft's path, however, could ruin the day for a lot of people. The potential science return (better magnetometer data of the subsurface ocean,if any, getting a new limiting size or directly imaging the cracks from where the jets are emitting, higher spectral resolution of the surface, etc) is worth it, but it's the largest gamble the mission has taken so far.

Err, that should probably be hitting, not missing. :)

@tetracycloide: They're European. Perhaps they can cope. I think they have English measurements in a museum someplace.

@codydog: if only NASA would do the same

@tetracycloide:
Actually, NASA does do the same. The problem in the past has been that some of the contractors they use in the US still use metric. That's what happened with the Mars Climate Orbiter. Lockheed Martin wrote all their software with the assumption that the given instructions would be in Imperial units.

Does anyone else find it ironic that the last significant country in the world to use the Imperial system of measure is the United States of America? Didn't they have a revolution or something to get away from all that British nonsense?

@Ryan H:

It's not actually the Imperial System, it's just similar. For example, the Imperial Gallon and the U.S. Gallon aren't the same.
-Kle.

30 miles? That IS pretty darn close. And the results will be A-MAYYY-ZING.

Casini IS a joint NASA/ESA mission, no? [en.wikipedia.org]