Modern boats are usually produced to a maximum of 6 feet 10 inches (2.08 m) wide to guarantee easy passage throughout the complete system. You can get wide beam boats which are 10ft to 12ft in width. The maximum length is about 72 feet (21.95 m), which matches the length of the longest locks on the system.
Wide beamed boats are generally between 10ft to 12ft in width. Narrowboats are usually 6ft 10" wide. Things to consider with regards to wide beam boats are:
You travel at about 3-4mph. This means that if you cruise for between four hours a day you'll cover about 16 miles or around around 80 to 100 miles in a week.
Canals fall into two categories.
Rivers have a flow on them unlike canals and special care needs to be taken if venturing onto tidal sections. If you do this always speak to the lock keeper to find out if you need to be aware of tide times.
Barges really have been designed for inland use but most inland barges can go to sea if necessary. You can take one across the English Channel or across the Wash.
Canal Boats travel along the Thames to transfer between waterways, in particularly the Grand Union Canal, The River Lee, and the non tidal Thames to Oxford and beyond. However the Thames is a powerful tidal river so advice should be sought before making a journey.
Boats are allowed to moor almost anywhere alongside canal towpaths but there are mooring rules. If you are on a long term mooring you're not usually allowed to live on your boat for more than a few days or weeks.
Yes but your boat needs to be equipped with port and starboard lights (red and green) and a white light at front and rear.