acoustic position reference system

acoustic position reference system

[ə′küs·tik pə′zish·ən ¦ref·rəns ‚sis·təm]
(engineering)
An acoustic system used in offshore oil drilling to provide continuous information on ship position with respect to an ocean-floor acoustic beacon transmitting an ultrasonic signal to three hydrophones on the bottom of the drilling ship.
References in periodicals archive ?
Ranger 2 is a high performance acoustic position reference system designed for tracking underwater targets and positioning dynamically positioned (DP) vessels.