who designed it?
Harry McNish, strengthened and adapted the boat to withstand the seas of the Southern Ocean.
Voyage of the James Caird
 Harry McNish, strengthened and adapted the boat to withstand the seas of the Southern Ocean, sealing his makeshift wood and canvas deck with lamp wick, oil paint and seal blood.
is james caird a ship who voyaged in the sea? Yes.
wiki:14038521
Voyage of the James Caird [SEP] Introduction
Shackleton decided to sail one of the lifeboats to South Georgia, not the closest human settlement but the only one not requiring sailing into the prevailing westerlies. Of the three lifeboats, the "James Caird" was deemed the strongest and most likely to survive the journey. Shackleton had named it after Sir James Key Caird, a Dundee philanthropist whose sponsorship had helped finance the expedition. Before its voyage, the ship's carpenter, Harry McNish, strengthened and adapted the boat to withstand the seas of the Southern Ocean, sealing his makeshift wood and canvas deck with lamp wick, oil paint and seal blood.