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Reliable and Confident Performance Prediction


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Hydrodynamic and Propulsion System Simulation

Quickly analyze vessel speed and power performance. NavCad provides maritime designers with the necessary tools for the optimized selection of suitable propulsion system components.

Unsurpassed in hydrodynamic design and analysis of ships

NavCad is the premier hydrodynamic and propulsion system simulation tool, providing powerful systems engineering calculations for the performance of marine vehicles. NavCad is built on a physics-based performance equilibrium of the Vessel-Propulsor-Drive system model, and is known for its reliable and confident prediction.

NavCad contains an extensive library of prediction methods for hulls, propulsors, and all necessary pieces, making it the most efficient and comprehensive platform for analysis from early-stage design through post-delivery trial evaluation. Used for any type of monohull or catamaran vehicle from large displacement vessels to fast planing craft to submersibles, it supports a variety of multiple drive options, including IC engines and electric motors.

Whether the focus is vessel, propulsor, drive – or the system – NavCad remains the gold-standard of performance prediction for more than 30 years.

Used by/Industries

Naval architects and designers

Hydrodynamicists and researchers

Propulsion equipment companies

Propeller manufacturers

Vehicle product developers

Navies, coast guards, and educational institutions

Advanced Analyses

The advanced features in NavCad allow you to go beyond speed prediction. Quickly analyze a project for bollard towpull or determine time-to-speed using an acceleration analysis. Use a variety of multiple drive options, including IC engines and electric motors. Employ existing assets such as model tests, sea trials, or CFD calculations to correlate and align predictions – bringing you the highest fidelity with the least cost. Use supplemental analyses to check hydroacoustics, sinkage and trim, drag reduction, dynamic planing stability, and more.

NavCad screen shot

NavCad Premium

The Premium Edition of NavCad offers a suite of power user tools for optimized design, lifecycle evaluation, and workflow efficiency. NavCad Premium is a vital tool for design space evaluation of the Vessel-Propulsor-Drive system or for the vessel hull form component. Its Analytical Distributed Volume Method (ADVM) supplements hull form analysis with a novel and proprietary numerical calculation of wave-making resistance. Scripting for batch calculations and use of NavCad Premium as a calculation server makes it the ideal coupled solver for optimization and integrated design studies with CAD and CFD. The duty-profile operating modes module gives users of NavCad Premium understanding of system performance metrics across the full operating scenario and ship life-cycle, including energy KPIs and GHG emissions.

NavCad Edition Comparison Table

“NAP Engineering is extremely happy to use NAVCAD, we are now convinced that our decision to invest in this program proved so right. NAVCAD ALLOWED US TO CORRECT AT LEAST TWO NEW VESSEL DESIGNS IN THE PAST MONTHS, since the initial data we had from other resources and theoretical resistance & EHP calculations were inadequate, incomplete and totally inappropriate for the specific vessels. These corrections towards the right path, made together with the extremely helpful HydroComp team of Experts, gave us not only the knowledge but also — and most importantly — the confidence to consult the Ship-Owners over critical decisions, like main engine selectin and re-calculation of specific hull parameters. We now use NavCade software for all our designs — current and future — in all type of vessels, including our new breed of LNG Bunker Vessels of “Amaltheia” Class.”

NAP Engineering


Design experts rely on NavCad for the prediction of attainable speed and range, power demand, fuel consumption


Vessel resistance predictions via dimensional analysis or numerical methods


Monohull or catamaran; slow-speed full ships to high-speed planing


Resistance of appendages, seas, wins, restricted waterways, towed bodies


Hull-propulsor interaction for both transit and towpull conditions


Steady-state equilibrium propulsion analysis for efficiency and power demand


A variety of propulsor options including FPP, CPP, CRP, waterjets


Sizing of principal propeller characteristics and optimum gear ratio


Propulsion analysis of towpull or vessel acceleration


Prediction of mission duty-profile propulsion KPIs and GHG emissions


Connection with external programs for design space studies

Technical Specifications

Vessel Types
  • Monohulls and catamarans
  • Displacement
  • Semi-displacement
  • Planing
  • Ocean-going merchant and naval vessels
  • Small ships and work boats
  • Motor and sailing yachts
  • High-performance vehicles
  • River barge trains
  • AUV/ROV propulsion
Calculation Protocols
  • CT-based ITTC-78 and user-defined
  • Equilibrium-trim planing analysis
  • Resistance prediction
  • Propulsion analysis
  • Propeller sizing
Resistance Prediction
  • Over 40 bare-hull methods
  • Alignment to resistance model tests and sea trials
  • Added drag for appendages, wind, seas, shallow water
  • Roughness effects
Propulsion Analysis
  • Prediction of hull-propulsor coefficients
  • Analysis by free-run, towing, bollard, or acceleration
  • Determination of thrust, power, efficiency, fuel rate
  • Extensive cavitation review
  • Multiple drive options, including IC engines and electric motors
Propulsor Options
  • Open, ducted, surface-piercing, and cycloidal propellers
  • Waterjets
  • Shaft angle effects
  • Added cupping or face curvature
  • FPP, CPP, CRP (Simple)
  • Cavitation breakdown
  • Alignment to propeller tests or CFD
  • Roughness effects
Propeller Sizing
  • Diameter
  • Pitch
  • Blade area ratio
  • Reduction gear ratio 
Integrated Calculation Spreadsheet
  • Evaluate arbitrary conditions
  • Analyze sea trials
  • Validate model tests
Supplemental Analyses
  • Hydroacoustics
  • Sinkage and trim
  • Synchronous pitching
  • Barge train resistance
  • Body-of-revolution submersibles and SWATH
  • Propeller CAD shape
  • EEXI
Design Guidance
  • Hull drag reduction
  • Optimum trim
  • Longitudinal wave-making energy

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Related Video and Tutorials

NavCad’s Electric Motor Features

A major update for NavCad is the new support for electric motors as the prime mover of NavCad’s Drive component.

Features of NavCad Premium Edition

See the new features for NavCad Premium, HydroComp’s latest and most advance package containing a collection of major new capabilities! This webinar will demonstrate some of the new premium tools and much more…

NavCad and Barge Resistance

Sometimes the least sophisticated vehicle is the hardest to analyze. With respect to resistance, this is definitely the case with barges. In this webinar, we will review three different barge configurations for analysis in NavCad – individual box barges, river barge trains (with pushboat), and integrated tug-barge units (ITB/ATB)…

Get flawless predictions

NavCad provides powerful systems engineering calculations for the performance of marine vehicles