WW2 service record

I am looking for advice on how to find my father's naval service. Mr. Patrick Fielder St. Claire Dunn who was an officer in the mercantile marine and in the service of the Norwegian Government WW2. For initiative he displayed when his ship was torpedoed (Atlantic ocean) he was awarded The Grand Order of St. Olaf which is allegedly the highest Norwegian decoration. He had not however, received the medal from King Haaken. Would I, as his only surviving offspring, be able to receive the medal as part of his service history (it would be very meaningful for me)? How would I go about accessing this piece of history. Any and all suggestions would be very welcome. Thank you, Patricia Dunn (his daughter). [email hidden]