Some probes use a small ground foot instead of any wire, allowing the ground link to be as short as 10 mm.

The probes could use an acoustic link instead, but the digital bursts might be heard by a sophisticated enemy.

Emissive probes use an electrode heated either electrically or by the exposure to the plasma.

A probe uses electricity to generate shock waves that break down the obstructing stone.

The probe uses the beam for braking.

"What kind of wave is the probe using?"

Both probes use electricity generated by decaying radioactive pellets of plutonium-238, which causes cancer and death in humans if inhaled.

The probe used the gravity from Jupiter to increase its speed.

To less sophisticated sensor probes than our own- probes using only the standard electromagnetic spectrum- it would appear completely real.

The probe had used his name again, and this was the first time it had taken an interest in any ship's area he had shown it.