This article is a travel topic.
Freighter travel is a less crowded, cheaper alternative for crossing a sea or ocean, not using airplanes or commercial cruise ships or ferries.
A well-kept secret in these days of airport anxiety and worry about aircraft emissions is that it is still possible to book a regularly scheduled sea passage to most parts of the world. While the world-famous Queen Mary 2 offers sometimes two departures in a month between Southampton and New York, many cargo-passenger services offer sailings every week of the year.
A tour of ports tells us what’s going on. From Southampton, for example, there are four weekly sailings, two each to the Far East and the Mediterranean, from Long Beach, there is a sailing nearly every week to the Far East, from Le Havre a weekly sailing to Martinique and Guadeloupe and so on. In all, there are now about seven or eight regularly-scheduled weekly services accepting passengers. In addition, there are frequent sailings to Australia and New Zealand, South America, the Far East and West and South Africa. Freighter travel is also possible in some smaller and/or third world countries. Freighter travel is virtually the only way to travel across the Caspian Sea and is a very common way to travel across the Black Sea. Be warned however, that in these regions, it is possible that ships will have to wait for days to be given access to the final port, facilities are bad, you likely have to bring your own food, and service is sporadic/unreliable(you will have to check every morning for departing ships).
Essentially, you are paying a cargo vessel to transport you along with whatever they are ferrying across the sea, usually containers these days, although some multi-purpose ships still survive and you can sail from the USA and Europe to China and Japan in a heavy-lift ship or from the Great Lakes to Europe in a grain carrier. Imagine having your own 100,000-tonner for just five passengers instead of the 5,000 that a similar-sized cruise ship might carry - many of the new container ships that serve the Far East from Europe and from California are now in this category.
Passengers on freighters are mainly retired and early retired people who can afford the time (it takes about a day of sea travel to cover an hour of air travel). There are also many returning students, relocating executives and their families, airline pilots (yes) and these days, people who are simply tiring of air travel. The vessels usually take no more than 12 passengers along.
The shortest passages are of course Transatlantic and these vary between eight and twelve days each way, while a voyage can be made around the world in between 80 and 120 days.
Probably you will need someone to introduce you into the freighter world, because it is a bit of a fuss for a company to take a passenger when they also take a multi million dollar cargo. However the crews seem to enjoy the company of passengers since the work is very monotonous.
There are some agents arranging trips, who charge around USD 75-100 (EUR 100-120) a day. With an introduction it might be as cheap as USD 50 (EUR 85), but don't count on it as many freighter trips, especially tramp trips that were cheaper, have been withdrawn since 2001.
A cheaper alternative is becoming part of the crew. findacrew.net  can help you with this.
Eat and Sleep
Typically, you will have a small cabin and access to crew facilities, such as lounge, mess hall and common areas. Dinner is usually served along with the ships crew. On some German ships, there are actually cabins that include both a day room and a bedroom, as well as en suite facilities. All freighter cabins are outside rooms except on Grimaldi Lines, who also have inside cabins. With most travel agencies, passengers receive cabins which have both shower and toilet.
Single travellers really benefit as single supplements are usually limited to between 10% and 25% (compared to 50 to 100% on cruise ships) and some ships have single cabins that are sold at the same fares as the double cabins.
Wine, beer and spirits are available at duty free prices (cruise ships now charge shore prices), and on French and Italian ships table wine is included with lunch and dinner.
While many travel books mention ferries across the Caspian Sea, these are actually cargo ships and on such you will be required to bring your own food and it is best to bring some bottled water too. On such ships, plan to bring more than you would need for the time specified, as ships can wait up to a week to enter ports.
See and Do
There are no major activities, restaurants, besides the mess hall, or other diversions aboard. At sea also no TV and radio, but much video and sometimes literature. Some ships have a (sea-water) pool and sauna, a gym and table tennis on board. The main activities are enjoying the sea, the weather, the birds and dolphins and the landscape while near port or close to land or even transitting canals if that is the voyage you have chosen.
Stay safe and healthy
Because of international regulations, unless the ship has a doctor aboard, the ship can only carry 12 passengers or fewer. For this reason, there are also age limits, usually between 70 and 79, depending on the line, and a medical certificate provided by the line normally has to be completed by your doctor before travel.
Because there are not many passengers, there is a lot of time that one has to oneself. Passengers are likely to receive a basic instruction on boat safety, weather and pirate danger.
Travel agencies specialized in freighter travel
There are few travel agencies in the world that have specialized in freighter travel.
- A la Carte Freighter Travel 
- Freighter Passenger Voyages 
- Cargo Passenger Lines 
- Maris Freighter & Specialty Cruises 
- Grimaldi Group 
- The Cruise People 
- Strand Travel 
- Hamburg Süd Reiseagentur 
- The Cruise People, Ltd. - Canada 
- Neptunia Cruises & Ferries 
- Sea Travel Ltd 
- Internaves Frachtschiffreisen 
Some shipping companies providing passenger transport in the Netherlands/Belgium on cargo vessels include:
- Anthony Veder 
- Nederlands Transport Bureau
- Deckers & Wirtz 
- Grisar & Velge
- VCK Zeereizen 
- Travel by cargo ship by H. Verlomme
- Vleugels van de brug, reizen per vrachtschip by A. Zuidhoek
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