CREATE TABLE table_203_201 (id DECIMAL, "class" TEXT, "type" TEXT, "ships" TEXT, "displacement" TEXT, "note" TEXT)

what is the number of displacement tonnes for a rari class tugboat ?
SELECT "displacement" FROM table_203_201 WHERE "class" = 'rari class'
SELECT "displacement" FROM "table_203_201" WHERE "class" = 'rari class'