CREATE TABLE table_56930 ("Ship name" TEXT, "Year" FLOAT, "Length" TEXT, "Width" TEXT, "Passengers" FLOAT, "Vessels" FLOAT, "Speed" FLOAT)

How many vessels are named aqua jewel?
SELECT COUNT("Vessels") FROM table_56930 WHERE "Ship name" = 'aqua jewel'
SELECT COUNT("Vessels") FROM "table_56930" WHERE "Ship name" = 'aqua jewel'