The NauticEd Bareboat Charter Clinic course deals with VHF licenses for chartering in the Mediterranean. Module 4 discusses use of the VHF covering such things as: appropriate non commercial channels for different countries, appropriate language and the phonetic alphabet, emergency hailing, non-emergency hailing, the channel reserved for DSC, broadcast distance and power.

Once complete the software will award a VHF endorsement on your certificate. However we also advise that you gain a government VHF operators license from your home country which will be respected in the country you are visiting.

In Canada - you should gain the ROC-M

In the USA you should gain the FCC VHF license. 

Module 4 of the NauticEd Bareboat Charter Clinic course details how you gain these additional government licenses.