It is pretty amazing how they managed to locate the wreck. Searching by sonar is a very time consuming activity and takes ages just to scan a very small area, with the added issues of interpreting the readings. I wonder what clues they had to narrow down the search area.
"Endurance was found just over four nautical miles (7.5km) and roughly southward of Frank Worsley's famous sinking position (68°39'30" South; 52°26'30" West)." [0]
Truly a testament to the skill of Frank Worsley, Endurance's captain, whose navigation was also essential in successfully reaching South Georgia in a modified lifeboat [1], returning themselves to civilization and calling for help to rescue the rest of Shackleton's men waiting on Elephant Island.
