CREATE TABLE table_63631 ("Vessel" TEXT, "Origin" TEXT, "Type" TEXT, "In service" FLOAT, "Unit" TEXT)

What type of ship is a Kobben class vessel that has been in service longer than 2?
SELECT "Type" FROM table_63631 WHERE "In service" > '2' AND "Vessel" = 'kobben class'
SELECT "Type" FROM "table_63631" WHERE "In service" > '2' AND "Vessel" = 'kobben class'