AHRS	Attitude and Heading Reference System
AR	Augmented Reality
ASV	Autonomous Surface Vehicle
AUV	Autonomous Underwater Vehicle
DOF	Degree of Freedom
DVB-T	Digital Video Broadcast
DVL	Doppler Velocity Log
EM	Electro-magnetic
GPS	Global Positioning System
IMR	Inspection, Maintenance and Repair
IMU	Inertial Measurement Unit
LBL	Long Base Line
LOA	Level of Autonomy
LoS	Line-of-Sight
MEMS	Micro-Electro-Mechanical Systems
MSIS	Mechanically Scanned Imaging Sonar
ROV	Remotely Operated Vehicle
RSM	Range Sensor Model
RSS	Received Signal Strength
SBL	Short Base Line
SDR	Software Defined Radio
SLAM	Simultaneous localisation and Mapping
SSLAM	Sonar-based Simultaneous localisation and Mapping
USBL	Ultra Short Base Line
UUV	Unmanned Underwater Vehicle
VIO	Visual Inertial Odometry
VSLAM	Vision-based Simultaneous localisation and Mapping