Tactical Dived Navigation System

A fully scalable tactical navigation solution built for the Military, designed for the harshest environments.

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Fully IMO compliant as an ECDIS as well as Type Approved as a WECDIS against NATO STANAG 4564.


Centralised presentation of key User information including specially tailored screen layouts for unique submarine navigation operations and requirements.  Advanced features simplify navigation and tactical problems improving the submarines Operational Capability.

Advanced submarine tool sets for navigation and mission planning, dived navigation fixing techniques, comprehensive Water Space Management, TMA, integration to submarine periscope, radar and CMS.

The submarine dived navigation space is the most demanding and challenging environment for naval operations. Whether it is inshore reconnaissance, blue water patrol or under the ice operations OSI’s TDNS is specifically designed to meet the challenges of the underwater battle space and increase submarine safety and tactical capability.

TDNS can be fully integrated with third party hardware system architecture, or supplied with a standalone console option, ranging from large horizontal displays, through to more conventional vertically aligned consoles.

Feature rich TDNS is able to provide the submariner with an extensive range of navigational capabilities as well as tactical features designed to help improve the Operational Capability while remaining focused on dived navigation safety:
Advanced navigation fixing techniques using ENCs as well as Raster Charts
Bottom Contour Fixing
Line of Soundings Fixing
3D Chart Display using standard ENC and AML/TOD data products
Vertical Sextant Angles
Fully Supports the construction of dived navigation charts for specific submarine operations
Automatic and Manual creation of Set & Drift calculations with the ability to change Time of Validity of information
Automatic and Manual Pool of Errors Calculation, future prediction of POE, PoE reduction through a variety of means
Water Space Management and Moving Havens
Target Motion Analysis

TDNS has also been successfully interfaced with a variety of submarine specific Combat and Fire Control Systems making it an extremely low risk and attractive solution to submarine navigation.

As part of TDNS OSI can also supply its NavTacDDU which enables the seamless integration of all submarine navigation sensors.  These sensors can then be distributed across the platform to a variety of other systems and users.  Additionally OSI’s unique submarine conning display is available as part of TDNS and this provides the submariner with additional submarine specific conning data including mast states.