I have 4 relatives that I know for sure were on the Marine Jumper, 28 May 1949. I have been unable to locate their names in the index for the New York Passenger Lists, 1820-1957. I have now determined why they are not in the index.
The microfilm for this ship is for the crew and employees only. I then went to the month of May 1949 for this database. I checked a sampling of the ships and all images were for the crew and employees only. There were no passengers on the lists digitalized. The sampling I did was to go to the first ship for each day of the month of May in 1949 and checked the images. For all 31 days of May I checked 1 ship manifest and for each one the images are for the crew and employees only.
I did not check other months in 1949 or any other year so I don't know how many months or years are missing the passengers.
I contacted Tech Support about this and have not received a reply yet.