Canadian Armed Forces (CAF) divers are specialists trained to perform underwater operations within their respective environmental commands. CAF divers are qualified in several sub-categories, including: Clearance Divers (CL Diver), Search and Rescue Technicians (SAR Tech), Port Inspection Divers (PID), Ship's Team Divers, and Combat Divers.

The CAF training agencies authorized to conduct CAF diving programs are:

Royal Canadian Navy Clearance Divers are trained to perform a variety of diving operations. These operations include the use of traditional open-circuit diving equipment (SCUBA), lightweight portable surface-supplied diving systems, commercial-grade mixed-gas surface-supplied systems and mixed-gas rebreather systems such as the CCDA and CUMA sets.

Clearance Divers are also equipped to operate fixed and portable hyperbaric chambers, enabling them to conduct complex underwater tasks, including diving medicine and decompression operations.

Canada currently has two operational diving units; RCN Clearance Diving Officers and Clearance Divers and Port Inspection Divers. Both units perform a variety of core capabilities.

These core capabilities are:

They also perform secondary or support functions to these core capabilities that include:

The two operational naval diving units are: