DMU Navigator (CATIA)
Digital Mock-Up — lightweight visualization, sectioning, clash detection, and measurement of very large assemblies.
Definition
DMU Navigator (and DMU Space Analysis, DMU Kinematics, DMU Fitting) consumes CATIA assemblies in lightweight visualization mode using CGR (CATIA Graphics Representation) files. Clash detection, distance measurement, sectioning, walkthrough, and exploded views run faster than in the full design mode.
Why it matters
Aircraft and car-body assemblies with 100k+ parts cannot be reviewed in full design mode. DMU is the review and coordination layer.
Common pitfalls
- Reviewing in DMU when design edits are intended — DMU is read-only on the design model.
- Clash detection with too-loose tolerances — false negatives on real conflicts.
- Visualizing without checking that CGR data is current — review against stale geometry.
This concept is a core structural element of the CATIA drafting and engineering environment developed by Dassault Systèmes. Dassault Systèmes' high-end PLM-grade CAD — the production tool of aerospace, automotive, and class-A surface modelling.
Relevant CATIA FAQs
❓ What's the difference between CATIA and SOLIDWORKS, both Dassault products?
Different markets. SOLIDWORKS is mid-market mechanical CAD (industrial machinery, consumer products). CATIA is high-end (aerospace, automotive, very large assemblies, class-A surfacing). CATIA's learning curve, price, and capability are substantially higher.
❓ Is CATIA available for individual hobbyists?
No. CATIA is sold through VARs to enterprises and educational institutions. Hobbyists looking for similar capability use Rhino (surfacing), Plasticity (modern direct modelling), Onshape (cloud), or older perpetual versions of SOLIDWORKS via student licenses.
❓ What is the difference between V5 and V6?
V5 is the file-based desktop platform (still widely used). V6 was the predecessor to 3DEXPERIENCE — server-stored on ENOVIA V6. CATIA on 3DEXPERIENCE is the current 'V6'-equivalent track. Many organisations run both V5 and 3DX in parallel.
⚡ Concept Self-Test
🎓 Recommended Practice Lessons
Step-by-step practical exercises and certification-aligned paths chosen by our editors to master this concept:
CATIA Professional Design & Engineering Specialization
Dassault Systèmes CATIA Certified Professional Exam Study Guide & Mock Practice
🌳 Semantic Crossroads & Navigation Pathways
Trunk-Branch-Leaf ModelCore glossary, interactive graph, and domain-wide concept index.
Parent design environments and platforms implementing this method natively.