The information on registered seafarers is not in all cases complete. As new sources are studied, information on engagements and medals etc. will be added to some of the already registered seafarers.
NorwaySjøforklaring, M/S Hardhausen
Ministerialbok for Sortland prestegjeld, Sortland sokn 1915-1925 (SAT/A-1459/895/L1374): https://www.digitalarkivet.no/view/255/pd00000035037563