pettersen ridge () is a ridge extending north for 6 nautical miles (11 km) from sandho heights in the conrad mountains of the orvin mountains, queen maud land. discovered and photographed by the german antarctic expedition, 1938-39. mapped by norway from surveys and air photos by the norwegian antarctic expedition, 1956–60, and named for sverre pettersen, steward with the norwegian antarctic expedition, 1957-58.