CREATE TABLE table_70308 ("Overall place" TEXT, "Yacht name" TEXT, "Skipper" TEXT, "Points" TEXT, "Combined elapsed time" TEXT)

Which skipper has barclays adventurer as the name of the yacht?
SELECT "Skipper" FROM table_70308 WHERE "Yacht name" = 'barclays adventurer'
SELECT "Skipper" FROM "table_70308" WHERE "Yacht name" = 'barclays adventurer'