CREATE TABLE table_35342 ("Designation" TEXT, "Bore" TEXT, "Weight" TEXT, "Service Charge" TEXT, "Range  ( yards ) " TEXT, "Number Made" FLOAT)

What is the service chage of the boat howitzers with a 12-pdr light destination?
SELECT "Service Charge" FROM table_35342 WHERE "Designation" = '12-pdr light'
SELECT "Service Charge" FROM "table_35342" WHERE "Designation" = '12-pdr light'