capnsensible
Well-known member
Limits are set as distance from a safe haven. In the case off Day Skipper, 20nm.According to the website a Day Skipper with the professional bits added can be used commercially. So I guess it is to the some limited extent.
There are also things like a Boatmaster Licence for things like tourist boats in local harbours. Fishing boat Skipper licences. And of course the stuff you will be familiar with, the MCA licences for Masters of vessels in increasing tonnageand reducing distance limits.