This is described by the proprietors as 'The World's most beautiful voyage.' I wouldn't know about that and they might not either but it's pretty special.
If you like a cruise with entertainment and 'Captain's Table' you could well hate this but if you fancy a working boat with marvellous scenery and great meals this is for you.
More on my travel report under Kirkenes
For the postal address relevant for you, check who are the agents in your own country.