CREATE TABLE table_65050 ("Driver" TEXT, "Navigator" TEXT, "Vehicle" TEXT, "Class" TEXT, "Capacity" FLOAT, "Total Time" TEXT, "Margin" TEXT)

What is the average capacity for the vehicle having a navigator of Macneall?
SELECT AVG("Capacity") FROM table_65050 WHERE "Navigator" = 'macneall'
SELECT AVG("Capacity") FROM "table_65050" WHERE "Navigator" = 'macneall'