Is it necessary to attend classes at school for tuba training?

Piping training must be carried out in schools. According to the shipping online crew recruitment website, the trainees who have been promoted to captain, first mate, chief engineer and bassoon will be trained for three and a half months. This kind of training is compulsory and must be full-time and full-time. Attendance needs to be guaranteed, and personal reasons such as absence from class will lead to disqualification.