Marine & Offshore
High-precision GNSS/INS positioning for vessel navigation, offshore wind installations, hydrographic surveys, and subsea operations -- engineered for multibeam workflows, PPP operations without a local base station, and reliable performance across the unique challenges of the maritime environment.
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Robust, centimeter-level positioning designed for the demanding conditions of open ocean, coastal waters, and port environments, with post-processed accuracy for hydrographic and offshore construction campaigns.
Vessel Navigation
Precise ship positioning for port approach, dynamic positioning reference systems, and open-ocean transit. INS-aided tracking keeps trajectories continuous during GNSS correction outages and signal blockages near cranes, bridge structures, and offshore assets, supporting safe berthing and departure operations for vessels of all sizes.
Hydrographic Surveys
Accurate bathymetric mapping with tightly coupled multibeam echo sounder integration. AlgoNav provides IHO S-44 aligned positioning and per-ping GNSS/INS states (position, heading, heave, pitch, roll, and timestamp) to keep seabed surveys compliant for charting, dredging, and engineering design.
Offshore Wind
Centimeter-level positioning for every phase of offshore wind farm development -- from geotechnical site investigation and monopile foundation installation to inter-array cable routing and long-term structural monitoring of turbine towers. PPP and PPK options support geodetic-quality results offshore, even when no nearby reference station is available.
Subsea Operations
ROV and AUV positioning through acoustic-inertial fusion, bridging the gap between surface GNSS and subsea acoustic systems. Our algorithms provide seamless handover from satellite to acoustic positioning for pipeline inspection and subsea construction, including operations with long GNSS-denied intervals between surfacing updates.
Use Cases & Applications
From shallow-water port operations to deep-ocean survey campaigns, AlgoNav positioning software adapts to the full spectrum of maritime and offshore workflows.
Hydrographic Surveying
IHO S-44 aligned positioning for multibeam echo sounder surveys and bathymetric mapping. AlgoNav delivers the horizontal and vertical accuracy demanded by Special Order and Order 1a specifications, while synchronizing position, heading, heave, pitch, roll, and timestamp for each sonar ping. This keeps depth measurements correctly georeferenced for chart production, dredge volume calculations, and habitat mapping. The workflow supports RTK, PPP, and post-processed PPK/PPP with precise orbit and clock products for campaigns where no local base station is available.
Offshore Wind Farm Installation
Precise positioning for monopile and jacket foundation installation, turbine erection, and inter-array cable routing. During foundation placement, even small positioning errors can lead to costly rework or structural risk. AlgoNav provides centimeter-level coordinates to the crane barge and jack-up vessel control systems, ensuring each foundation lands within tolerance. For cable lay operations, continuous position and heading data guide the cable plough along the designed route corridor, with PPP fallback where shore-based RTK links are impractical.
Port & Harbor Operations
Vessel traffic management, dynamic positioning reference, and berth approach guidance in congested port environments. GNSS signals in harbors are frequently degraded by multipath reflections from cranes, container stacks, and wharf structures. AlgoNav advanced multipath mitigation algorithms maintain reliable positioning accuracy throughout the approach channel and alongside the quay, while INS bridging handles short GNSS dropouts and correction link interruptions without forcing resurvey of critical tracks.
Subsea Pipeline Inspection
ROV and AUV positioning with acoustic-inertial fusion for pipeline route surveys, free-span detection, and cathodic protection inspections. AlgoNav bridges the GNSS-to-acoustic transition at the sea surface, providing a precise surface reference that propagates through USBL or LBL acoustic systems to the subsea vehicle. Tightly coupled inertial aiding fills gaps during acoustic dropouts, maintaining continuous position output along the pipeline corridor and enabling consistent tracks through GNSS-denied subsea segments.
Challenges We Solve
Maritime positioning presents unique obstacles that land-based systems never encounter. AlgoNav algorithms are purpose-built for these conditions.
Motion Compensation
Roll, pitch, and heave compensation through tightly coupled INS integration for stable positioning on moving vessels. Sea state conditions cause continuous antenna motion that must be modeled in GNSS processing and multibeam georeferencing. AlgoNav couples high-rate IMU data with carrier-phase observables to separate vessel dynamics from positioning error, maintaining centimeter-level trajectories and stable attitude outputs for hydrographic workflows in rough water.
Open Ocean Positioning
Reliable centimeter-level accuracy far from shore with Precise Point Positioning -- no base station required. Offshore operations frequently take place hundreds of kilometers from the nearest reference station. AlgoNav PPP engine uses precise satellite orbit and clock products to achieve centimeter-level horizontal accuracy and sub-decimeter vertical accuracy without local infrastructure. Post-processed PPP further improves consistency for long offshore lines and quality control when real-time corrections are limited.
GNSS Outage Handling at Sea
Correction links and satellite visibility can drop during weather events, port maneuvers, or work near offshore structures. AlgoNav fuses GNSS and INS to bridge these outages, preserve continuous vessel trajectories, and recover full-quality positions in post-processing. Integrated multipath mitigation for the water surface further reduces bias when signals return.
Timing & Vertical Datums
Hydrographic projects depend on clean timing and correct datum transformations. AlgoNav aligns GNSS/INS outputs with survey sensors using precise time references and applies geoid and tide-model reductions from ellipsoidal height to chart datums such as LAT and MSL. The result is consistent depth georeferencing across acquisition, processing, and final deliverables.
Standards Compliance
AlgoNav positioning solutions are designed to meet the regulatory and quality requirements of the maritime and offshore industry.
IHO S-44
Full compliance with International Hydrographic Organization survey standards, including Special Order, Order 1a, and Order 1b horizontal and vertical accuracy thresholds for bathymetric survey positioning. AlgoNav supports the positioning, motion, timing, and datum control needed to document compliance within hydrographic quality workflows.
IMO / SOLAS
Maritime safety positioning requirements as defined by the International Maritime Organization and the Safety of Life at Sea convention, supporting compliant navigation and vessel tracking systems.
Offshore Standards
Alignment with DNV (Det Norske Veritas) and API (American Petroleum Institute) positioning guidelines for offshore construction, mooring analysis, and DP reference system verification.
Data Formats
Native support for common hydrographic and maritime data formats including NMEA 0183, NMEA 2000, and standard position output telegrams used by survey acquisition software, DP systems, and ECDIS navigation displays, including timing and metadata fields required for multibeam and datum-aware processing chains.
Navigate with Precision
Discover how AlgoNav supports maritime and offshore operations with positioning solutions built for the unique demands of the marine environment.