Why do you need a medical certificate?
A medical certificate from an official registered medical centre guarantees the required health conditions of the insurance-holder as well as certifying that you are fit and healthy enough to carry out any water sport.
Remember that a medical certificate is a compulsory requirement to be able to dive anywhere in Europe. Certificates must be renewed every 2 years for recreational divers and every year for professional divers. They must be signed by a hyperbaric doctor or a doctor specializing in sport medicine.