Opportunity continues to make inch-by-inch progress toward getting out of the dune where it has been dug-in since sol 446 (April 26).

Sol-by-sol summaries:

Sol 467 (May 17):
Opportunity was commanded to rotate its wheels enough to have rolled 4 meters (13 feet) if there were no slippage. It advanced 2.1 centimeters (0.8 inch) through the loose material of the dune.

Sol 468:
A commanded motion of 8 meters (26 feet) was executed this sol. Forward progress was about 4 centimeters (1.6 inches).

Sol 469:
A 2-meter (7-foot) drive was commanded, and Opportunity advanced about 1 centimeter (0.4 inch).

Sol 470 (May 20):
The rover was sent commands for a 12-meter (39-foot) drive. This drive incorporates larger step sizes, lower current limits for the drive motors, and a lower bogie angle limit.

Spirit of Dust Devils