Definitions
30
Definitions
Term
Definition
AAINS
Acoustically Aided Navigation System
AC
Alternating Current
Accelerometer
A sensor that measures changes in velocity (acceleration)
AHRS
Attitude and Heading Reference System. An inertial sensor that provides
outputs of heading, pitch and roll
DC
Direct Current
FWD
Forward
IMU
Inertial Measurement Unit
Inertial Navigation System
(INS)
A navigation aid that uses inertial sensors to continuously calculate the
position, orientation and velocity of a moving object
MTBF
Mean Time Before Failure
PC
Personal Computer
RLG
Ring Laser Gyroscope, A sensor that measures rotation
SPRINT
An Acoustically aided inertial navigation system for subsea vehicles. The
system extends the operating limits of USBL and improves the operational
efficiency of LBL by using sparse arrays
STBD
Starboard