The Thames is regulated by locks right up to London. It’s pondlike for the duration. These are the major considerations for taking a narrowboat on the Thames. Mooring: Despite what people tell you or you may have read elsewhere, mooring is going to be your number 1 consideration. Your boat’s draft, (the amount of the boat underwater), is going to restrict your access and ability to moor ad-hoc. Most of Thames bankside being private property is also a restricting factor….