Passage: Despite these setbacks, the Ross Sea party survived inter-personnel disputes, extreme weather, illness, and the deaths of three of its members to carry out its mission in full during its second Antarctic season. This success proved ultimately without purpose, because Shackleton's main expedition was unable to land after Endurance was crushed in the Weddell Sea ice. Shackleton eventually led his men to safety, but the transcontinental march did not take place and the Ross Sea party's depots were not required.  The Ross Sea party remained stranded until January 1917, when Aurora, which had been repaired and refitted in New Zealand, arrived to rescue them. Public recognition of their efforts was slow in coming, but in due course four Albert Medals were awarded to members of the party, two posthumously. Shackleton later wrote that those who died "gave their lives for their country as surely as those who gave up their lives in France or Flanders."

Question: The Ross Sea Party was stranded due to what mode of transportation was destroyed in the sea?
Endurance