Extensive training in 3 NDL specialties (diving, night diving and underwater navigation). The qualification ADVANCED UNIVERSAL DIVER NDL allows you to: Effectively navigate under water when diving Improve the safety and comfort of night dives Improve the safety and comfort of the diver in deep dives The maximum recommended depth is 40 m. Cost: $350/person. Book your tour in advance. Contact us right now and get 10% discount.