KONGSBERG DPS i2 Inertial Navigation System: A New Benchmark for GNSS and INS Fusion Positioning

For higher demand applications, two DPS systems can be configured, combined with MGC/MRU sensors, to achieve:

Complete redundancy: seamless switching between primary and backup systems.

GNSS direction finding: using two antennas to determine the bow direction of the ship as a supplement or backup to MGC.

Anti spoofing detection: By comparing GNSS position/heading with INS calculations, detect and alert potential signal spoofing.

Compatible with existing sensors

The DPS i series can be paired with dedicated MGC or MRU, or can utilize compatible sensors already on board to protect existing investments.

Remote Service and Diagnosis

The DPS i series is ready for K-IMS remote services. Through K-IMS, experts from Kongsberg can remotely access the system for:

Status monitoring: Real time monitoring of system health status.

Fault diagnosis: Quickly analyze the cause of the problem, and many situations that previously required engineers to board the ship can now be solved remotely.

Software update: Safely push firmware upgrades.

This greatly shortens the troubleshooting time and improves the operational efficiency of the vessel.

Technical Specifications

performance parameters

Parameter numerical conditions

Non differential positioning accuracy 1.3 m 95% CEP standard mode

High precision mode<10 cm 95% CEP dependent subscription service

DGNS positioning accuracy<1 m 95% CEP enabled differential correction

SBAS positioning accuracy<1 m 95% CEP enabled SBAS

Speed accuracy<0.01 m/s 95% CEP-

The roll/pitch accuracy can be found in the separate manual of MGC/MRU-

Update rate 1-20/200 Hz position/attitude

Delay<1 ms-

Note: All accuracy indicators are based on actual measurements in the North Sea and may vary in different sea areas.

interface

Type and quantity description

Serial port 8 isolated, 6 configurable RS-232/422

IMU interface 1 RS-422

Ethernet/LAN 4-

USB 3 is used for maintenance and upgrades

data format

NMEA 0183 v3.0：ABBDP、ARABB、DPGG、DTM、GBS、GGA、GLL、GNS、GRS、GSA、GST、GSV、RMC、VDW、VER、VTG、ZDA

RTCM input: v2.2, 2.3, 3.0, 3.1; Seastar XP/XP2/G2/G2+； CMR

Input correction

DGNS correction

RTK correction

Compass input (NMEA HDT/HRC/THS, Robertson LR22 BCD)

Display Control (DDC)

Supported inertial sensors

MGC R3, MGC R2

MRU 5+

Power and Environment

Component power supply operating temperature

DPS i2 processing unit 100-240V AC see detailed specifications

HMI display unit - see detailed specifications

GNSS antenna powered by processing unit -40 ° C to+70 ° C

Humidity: Maximum 95% without condensation

Vibration: Complies with IEC 60945

Electromagnetic compatibility: Compliant with EMCD, IEC 60945

Safety: Compliant with LVD, IEC 61010-1

Product standard: Complies with IMO resolutions and UKOQA certification

Weight and Dimensions

Component weight and size

DPS i2 processing unit --

HMI Unit --

GNSS antenna --

Note: For detailed mechanical dimensions, please refer to the official installation manual.

Application scenarios

Dynamic Positioning (DP) Ship

For DP-1/2/3 class vessels, DPS i2 can serve as the core position reference system. Its high-precision positioning capability without calibration services enables ships to maintain DP capability even in operations far from the coast. Dual system configuration can meet redundancy requirements.

Survey and measurement vessel

Marine geophysical surveys and hydrological measurement tasks that require high-precision positioning can benefit from DPS i2's low latency, high update rate position output, and precise lever arm compensation.

Platform supply and construction vessel

When working near offshore facilities, signal obstruction is severe. The INS filling capability of DPS i2 ensures uninterrupted positioning and improves job safety.

National Defense and Security

The anti-interference and anti deception characteristics make it suitable for military ships and law enforcement vessels in sensitive waters.

Summary of Core Advantages

GNSS+INS deep fusion: Overcoming the limitations of a single sensor, providing continuous, stable, and high integrity positioning.

High precision without calibration service: reduces operating costs, especially suitable for offshore operations.

Enhanced RAIM integrity: INS assistance makes fault detection more sensitive, ensuring DP safety.

Scalable architecture: from single system to multi system redundancy, GNSS direction finding, anti spoofing, adapting to different needs.

Intuitive HMI: Designed in collaboration with DP operators to enhance situational awareness and decision-making efficiency.

Remote Service Ready: K-IMS supports remote diagnostics and upgrades, reducing downtime.

Multi purpose MGC: The integrated high-precision gyro compass can simultaneously serve other onboard systems.