inertial reference system

strapdown inertial reference system

attitude-and-heading reference system / attitude and heading reference system (AHRS)

inertial guidance system

inertial navigation and attack system (INAS)

inertial navigation system (INS)

strap-down inertial navigation system

gimballess inertial navigation system

stellar inertial navigation system (SINS)

embedded global-positioning and inertial-navigation system (EGI) / embedded GPS/INS

enhanced global positioning and inertial navigation system (EGI) / enhanced GPS/INS

Doppler-inertial guidance navigational and attack system

radio-inertial guidance system

inertial guidance

precision inertial navigation systems (PINS)

inertial coordinates

inertial model

inertial navigation

inertial Cartesian coordinates

all-inertial guidance

inertial measurement unit (IMU)

celestial-inertial guidance

radio-inertial guidance

grid reference system

guidance reference system

military grid reference system (MGRS)

numbered reference position system

World Geographic Reference System (WGRS); georef

muzzle reference system (MRS)

strapdown attitude heading reference system

vertical reference system

attitude-and-heading reference system (AHRS)

heading and attitude reference system