for the level 5 Knight , Training in Martial Arts, Scuba Dive, O weapons, one of this training , is recommend but no Mandatory

the reason asking for this kind of training is to have the volunteer well prepare in self defenses and Logistics.
and i most cases when they reach adult each they will have the chance to bring they own groups and will need to transport volunteers to the locations .
having this knowledge will help coordinate and manage a better Logistic.