Question: Tell me the average gross tonnage for April 1919 entered service
SQL: SELECT AVG("Gross Tonnage") FROM "2-11662133-1" WHERE "Entered service" = 'April 1919';

Question: I want the total number of gross tonnage when entered service was 1903
SQL: SELECT COUNT("Gross Tonnage") FROM "2-11662133-1" WHERE "Entered service" = '1903';