CREATE TABLE table_name_52 (tonnage__grt_ INT, date VARCHAR)

Which Tonnage (GRT) is the highest one that has a Date of 16 june 1940?
SELECT MAX(tonnage__grt_) FROM table_name_52 WHERE date = "16 june 1940"
SELECT MAX("tonnage__grt_") FROM "table_name_52" WHERE "16 june 1940" = "date"