This definition appears somewhat frequently
See other definitions of PSD
Samples in periodicals archive:
Public Safety Diving and Surface Water Rescue activities are by their nature very different from recreational diving. The importance of appropriate training...
Public Safety Diving Association and Water Rescue; Flash Plugin Required. You do not have the required Macromedia Flash Plugin to view the Flash Animation.
Public Safety Diving certifications are issued through the Public Safety Diving Association of Florida and PADI. PSDA issues each card with a continuing education...
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