Trondheim emigrants' travel routes.

The people recorded at Digitalarkivet as emigrating from Trondheim in 1923,1924, for instance, are noted as leaving from other Norewgian ports. Per Bjorling had a travel date of 12.07.1924 and under "Skip" it says "Jernb. Bergen". Is he actually leaving Norway via the port of Bergen? Is the date above the departure date from Trondheim or from Bergen ? How did the emigrants go from Trondheim to Bergen, by rail or by coastal ship? Some days, upwards of 100 emigrants left Trondheim to catch 3 different ships from separate Norwegian ports. If they went by rail were there guides along to help with rail transfers, and to facilitate reaching the ships on time? Many thanks for answers or directions to pages or websites dealing with this segment of the Scandinavian emigrant experience. TV