Marine Hydraulic Design Software: Why General CAD Falls Short

Why general CAD falls short in marine hydraulic design

Many hydraulic engineering teams working in marine and offshore environments still rely on general-purpose CAD software. It covers the basics: drawing lines, placing symbols, and producing engineering documentation. But marine hydraulic systems are far from basic.

Hydraulic schematics for naval vessels, offshore platforms, and commercial ships often involve:

Multi-section flow-sharing valve assemblies with configurable pilot supply, unloading, and flushing functions
Winch and crane control systems with specific redundancy requirements
Deck machinery, steering gear, ramps, and hatch systems, each with dedicated hydraulic circuits
Documentation that meets the requirements of classification societies such as DNV, Lloyd's Register, and Bureau Veritas

General CAD tools require hydraulic engineers to adapt their workflow to software that wasn't designed specifically for hydraulic engineering, building custom symbol libraries, manually maintaining component data, and managing documentation that quickly falls out of sync with the design. Purpose-built hydraulic design software eliminates that overhead by providing tools developed specifically for creating hydraulic schematics and documentation.

What purpose-built hydraulic software delivers

Hydraulic-specific design tools are built around the actual workflow marine engineers follow:

Schematic design → Component selection → Documentation generation → Revision management

HydroSym, Paro's hydraulic schematic software, gives marine engineers:

An extensive library of hydraulic components with ISO 1219-1 compliant symbols, including highly configurable valve assemblies relevant to marine applications
Intelligent configurators that handle complex component variations without manual symbol editing
Automatic data sheet generation for every component in the schematic
Centralized project files that keep cross-functional teams aligned across locations and disciplines

The result is a faster design process with significantly less manual effort and documentation that remains complete and consistent throughout the project lifecycle.

The documentation imperative: designing for a vessel that operates worldwide

One challenge makes marine hydraulic engineering fundamentally different from many other industries: you don't know where your hydraulic system will need to be maintained.

Unlike factory machinery, vessels operate worldwide. A hydraulic system may require maintenance months or even years after installation at a port on the other side of the world. The engineer on site needs complete, accurate, and up-to-date documentation, not a call back to the original designer.

MacGregor, a global leader in cargo and load handling solutions for merchant ships, offshore vessels, and naval ships, uses HydroSym specifically for this reason. Automatically generated data sheets for every component in their hydraulic schematics allow maintenance teams to access accurate technical information wherever the vessel is located. When your fleet is global, your documentation has to be too.

Offshore jack-up drilling platform at sea during sunset, representing marine and offshore engineering where hydraulic systems and specialized design software are essential. — An offshore platform where complex hydraulic systems power critical marine operations.

Handling specialized components: when the library doesn't cover your design

Marine hydraulic systems often include specialized components not found in standard libraries. Flow-sharing valve systems, custom winch control blocks, and application-specific manifold configurations are common in offshore and naval projects.

When Hydtec, a Swedish engineering company specializing in marine hydraulic systems, needed a complex flow-sharing control block for a Swedish Coast Guard project, the component wasn't available in the standard HydroSym library.

Paro developed it in direct collaboration with Hydtec's engineers, building a fully functional configurator with advanced section configurations, end-plate configurations, and pilot supply logic. The component was delivered within weeks and added to the library for future use.

This kind of responsive, engineering-led support is one of the key advantages of working with a dedicated hydraulic software partner rather than relying on an off-the-shelf CAD solution.

From schematic to manifold: completing the hydraulic workflow

For engineers who design hydraulic manifolds as part of their marine projects, HydroMan extends the workflow beyond the hydraulic schematic.

HydroMan continuously validates the manifold design through drilling validation, 2D and 3D collision detection, and built-in engineering rules running throughout the design process. Errors caught during design cost nothing to fix. Errors discovered during production or, even worse, on board a vessel can be significantly more expensive.

The right tool for the demands of the sea

Marine and offshore hydraulic engineering demands precision, specialized knowledge, and documentation that can stand on its own, in any port, on any vessel, and years after the original design was completed.

General-purpose CAD software wasn't built for these requirements. Purpose-built hydraulic design software was.