But, I just want to transport British units from England to France, to a friendly port! What order do I need to give after departure of transport convoy? Same, "distant unload", correct?
If that's all you're after I'm sorry to have overloaded you with extraneous detail, Ed. In principle the process of shipping units from one friendly port to another is dead simple.
No order is required. You just lob your troops onto your transports as Bargo has described, then mouse the transport unit directly into the port province. You will need to take care in ensuring that you do hit the port province itself, however, and not the bordering ocean province or any other naval unit in the vicinity - the system can find itself confused by clutter at times.
As to the "distant unload" command, that's to be used for landing units in unfriendly provinces or friendly provinces lacking a port. You load up in the same way, hit the "distant unload" order and you'll get a pop-up instructing you to tag the target province, do that then mouse your fleet to a sea zone adjacent to that province, and "Voila". If all goes well weather, traffic, and interception wise you'll get your boys landed there in a timely fashion. (Hint: all things often go less than well).