AD: Adventure Diver
AI: Advanced Instructor
AIE: Advanced Instructor Exam
BOW: Basic Open Water
BP/W: Backplate and Wing
CPTD: Cumulative Pulmonary Toxic Dose
DIR: Doing It Right
DO: Dive Officer
DWR: Diving at Work Regulations
EFR: Emergency First Response
fHe: Fraction of Helium
fN2: Fraction of Nitrogen
fO2: Fraction of Oxygen
HEPCA: Hurghada Environmental Protection and Conservation Association
NABS: National Association of Black Scuba Divers
NDS: No Decompression Stop
NMRI: Naval Medical Research Unit
NSS-CDS: National Speleological Society-Cave Diving Section
OOA: Out of Air
OS: O.S. Systems, Inc.
OWD: Open Water Diver
PG: Pressure Group
PPB: Peak Performance Buoyancy
ppHe: Partial Pressure of Helium
ppN2: Partial Pressure of Nitrogen
ppO2: Partial Pressure of Oxygen
RD: Rescue Diver
RHIB: Rigid-Hulled Inflatable Boat
SDC: Skill Development Course
SNUBA: Snorkeling SCUBA
SNUBA: Surface Nexus Underwater Breathing Apparatus
WC: Water Capacity
WP: Water Pressure
WPB: West Palm Beach
YBOD: Yellow Box Of Death