MicronNav 200 Hardware Manual
0734-SOM-00002-01
Page 6 of 27
Introduction to Tritech USBL Technology
The MicronNav 200 system is the latest
generation of Ultra Short Base Line
(USBL) positioning system from Tritech.
The system is designed for small vehicles
and diver supporting applications.
The system benefits from a number of
new features including data transfer
interleaved
with
USBL
positioning,
software integration into Google Maps™,
smaller, more accurate USBL Dunking
Transducer and compatibility with the
new Micron Battery Modem.
The system comprises a subsea Micron Modem or Battery Micron Modem, a surface USBL
transducer with integral magnetic compass and pitch/roll sensors, a surface MicronNav 200
interface hub and bespoke operating software under control of a topside PC/laptop.
The MicronNav 200 uses spread spectrum acoustic technology. This provides a robust
method for communication between the dunking transducers and the vehicle Micron
Modem/Micron Battery Modem.
The USBL Dunking Transducer can provide 180degree hemispherical coverage below the
transducer, which allows vehicle tracking in very shallow water. Omni-directional coverage is
provided by the Micron Modem and Micron Battery Modem.
The Micron Modem is a stand-alone device which either responds to acoustic interrogation
from the USBL Dunking Transducer (Transponder mode) or is triggered by RS232 / RS485
(responder mode) through the main port. The Responder trigger can come either from the
auxiliary port on a Tritech Micron Sonar, or directly from the MicronNav 200 interface hub.
Both the USBL Dunking Transducer and the Micron Modem/Micron Battery Modem can be
commanded to switch from positioning mode to data transfer mode, allowing the same
hardware to be used to establish an underwater acoustic communications link.
