Trinity House - Patricia Voyages
- Flagship carrying passengers as she completes vital work. Guests are able to experience a voyage and the type of work the ship undertakes. Ship details plus brochure request.
- http://www.trinityhouse.co.uk/events_and_leisure/patricia_voyages.html

Stena Line
- Overnight and day crossings from Harwich to the Hook of Holland. Offers timetables, ship details and online booking.
- http://www7.stenaline.co.uk/servlet/se.ementor.econgero.servlet.presentation.Main?data.node.id=18863&data.language.id=2

Harwich.Net
- Visitors guide, history and business showcase. Includes travel and town diary for the historic port of Harwich.
- http://www.harwich.net/

Harwich Connexions
- Operates the Transport Co-operative, Tourist Information Centre and the 1912 Centre, a group hostel for visiting groups and parties. Also offers maps.
- http://www.harwichconnexions.co.uk/

Harwich Maritime Heritage Trail
- A virtual tour of the ancient English seaport of Harwich. Harwich Society details, local maps, guest book and links.
- http://users.quista.net/farnell/