Scapa Flow Harbours
- Information for the mariner and port user to assist in using the marine facilities offered in Orkney. Discusses operations and development issues and lists weather reports, port news, and notices to mariners.
- http://www.orkneyharbours.com/

Northlink Ferries
- Car and passenger ferry services to the Orkney and Shetland islands.
- http://www.northlinkferries.co.uk