Spec. Assist Diving Services To The Construction Industry Nationally. Diving--Commercial - South Fremantle, WA . Service: Cleaning, Construction, Drilling, Photography, Salvage, Surveys, Vibrocoring, Video, Welding. Specialty: Contaminated Water, Demolitions. Hours of Operation: 24hr Emergency Service. Payment Method: Cash, Cheques, Money Order. Service Option: By Appointment, Delivery, Emergency Service, Mobile Service. Material: Concrete, Steel. Payment Concern: Rentals. Assurance: Accredited, ARC, Certified, Insured