CREATE TABLE table_8360 ("Date" TEXT, "Name of ship" TEXT, "Nationality" TEXT, "Tonnage" FLOAT, "Fate" TEXT)

What was the average tonnage for Beatus, raided on 18 October 1940?
SELECT AVG("Tonnage") FROM table_8360 WHERE "Date" = '18 october 1940' AND "Name of ship" = 'beatus'
SELECT AVG("Tonnage") FROM "table_8360" WHERE "Date" = '18 october 1940' AND "Name of ship" = 'beatus'