CREATE TABLE table_53263 ("NATO member" CLOB, "Aircraft carriers" CLOB, "Battleships" CLOB, "Cruisers" CLOB, "Escorts" CLOB, "Submarines" CLOB, "Torpedo boat squadrons" CLOB, "s Motor ship / s Naval trawler" CLOB, "Grand Total" FLOAT)

How many ships for the nation with grand total of 20?
SELECT "s Motor ship / s Naval trawler" FROM table_53263 WHERE "Grand Total" = '20'
SELECT "s Motor ship / s Naval trawler" FROM "table_53263" WHERE "Grand Total" = '20'