Dynamic Positioning  - Inertial Position Reference Sensor (D-PINS)^TM

D-PINS^TM is an aided inertial position reference sensor specifically designed to provide reliable position inputs to any DP desk through short term outages of either/both DGPS or Acoustics.

D-PINS^TM removes the position jitter from ultra-short baseline acoustic positioning systems (USBL) in deep water significantly reducing rig or construction vessel time when moving onto location.

D-PINS^TM easily installs into existing configurations. The system takes standard DGPS and Acoustic telegrams from existing systems and blends this data with a navigation grade inertial measurement unit to deliver a position telegram into an open position reference slot within the DP desk.

The system can run offline to allow operator familiarity while logging both DGPS, Acoustic and D-PINS data for comparison. Once operators are fully trained on the system D-PINS can be brought on line like any other position reference sensor.

D-PINS^TM is a fully integrated system including:

High-performance inertial sensors

Simple user interface software

Data fusion software

I-O hardware interfacing multiple aiding sensors 

Rack mounted hardware and cables

Position, attitude, velocity output at up to 5Hz

Data logging capability

Audit trail for operator history logging

D-PINS^TM delivers the same precision as conventional DGPS or acoustic positioning systems as well as very precise heading and attitude data.

The position out will degrade if no input from either DGPS or acoustics are available. Without any external references the position will drift from the last known position as follows:

> 2 minutes  - between 1m to 2m

> 5 minutes  - between 5m to 8m

> 10 minutes - >10m