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glossary 
A - B - C - D - E - F - G - H - I - J - K - L - M - N - O - P - Q - R - S - T - U - V - W - X - Y - Z
Letter Term Definition
A ADAN Autonomous Diver Acoustic Navigation system
  AHRS Attitude, Heading & Reference Sensor
  ANT Acoustic Navigation Tester
B BOP Blow Out Preventor
  BOPNav BOP Navigation
C CASIUS Calibration of Attitude Sensors in USBL Systems
  Compatt COMPuting And Telemetry Transponder
  CIF Common Interrogation Frequency
  CRF Common Reply Frequency
  DPT Dynamic Positioning Transponder
D DAU Data Acquisition Unit
  DGPS Differential Global Positioning System
  DORT Deep Oceanographic Release Transponder
  DPS Dynamic Positioning System
  DTU Deck Test Unit
E EHF Extra-High Frequency (50-110kHz)
F FPS Floating Production System
  FPSO Floating Production Storage and Offloading
G GPS Global Positioning System
H HF High Frequency (35-55kHz)
  HGPS Head and Gun Positioning System
I IRF Individual Reply Frequency
  INS Inertial Navigation System
L LBL Long BaseLine
  LCU Lightweight Command Unit
  LF Low Frequency (7.5-15kHz)
  LSBL Long and Short BaseLine system
  LUSBL Long and Ultra Short BaseLine system
  LSUSBL Long, Short and Ultra Short BaseLine system
M MF Medium Frequency (18-36kHz)
  MRAMS Marine Riser Angle Monitoring System
O OBC Ocean Bottom Cable
  ORT Oceanographic Release Transponder
P PAN Programmable Acoustic Navigator
  PGT Programmable Generic Transponder
  Pharos Precision underwater navigation and tracking software ranging from single to multiple vehicle tracking.
  PTT Compatt 5 Back Deck Test PDA (Pocket Test Terminal)
R ROVNav Rov Navigation
  RTS Radio Telemetry System
S SBL Short BaseLine
  SEM Subsea Electronics Module
  SHROVNav Ship and ROV Navigation
  SIPS Seismic Integrated Positioning System
T TLP Tension Leg Platform
  TZ Transition Zone
U USBL Ultra Short BaseLine
  UHDLS Under Hull Diver Location System
V VRU Vertical Reference Unit
W WSM Wideband Sub-MIni
  Wideband A new generation acoustic positioning technology utilising digital signal processing to provide more robust and reliable acoustic navigation and communications
X XSRS cross(X) Streamer Ranging System