CREATE TABLE table_63632 ("Vessel" TEXT, "Origin" TEXT, "Type" TEXT, "In service" FLOAT, "Unit" TEXT)

What is the unit for a submarine type ship from Norway?
SELECT "Unit" FROM table_63632 WHERE "Type" = 'submarine' AND "Origin" = 'norway'
SELECT "Unit" FROM "table_63632" WHERE "Origin" = 'norway' AND "Type" = 'submarine'