CREATE TABLE table_5962 ("Callsign" TEXT, "Area served" TEXT, "Frequency" TEXT, "Band" TEXT, "On-air ID" TEXT, "Purpose" TEXT)

Band of am, and a Frequency of 0 846 has what purpose?
SELECT "Purpose" FROM table_5962 WHERE "Band" = 'am' AND "Frequency" = '0 846'
SELECT "Purpose" FROM "table_5962" WHERE "Band" = 'am' AND "Frequency" = '0 846'