Hydrostatics and Stability

Industry standard software for ship stability analysis

NAPA offers a comprehensive set of tools for flexible 3D modeling and ship stability analysis, trusted by the shipbuilding industry and authorities for decades.

Benefits

Unique 3D model, enabling flexible design variations and optimization
All relevant required naval architectural calculations in one package
Comprehensive rule compliance analysis, including the latest rules and regulations

Modern first principle analyzing tools, such as NAPA Flooding Simulation
Industry standard calculation engine, enabling smoother approval process

Capabilities

3D modelling tools

State-of-the-art 3D modelling tools

Hydrostatics and capacities

Hydrostatic calculations for all floating objects and compartment capacity analysis

Inclining test

Calculation of the lightweight and center of gravity, based on inclining test measurements and 3D model

Loading conditions

Tank and mass loads, grain loads, containers, dual and deck loads, wide variety of calculation options and analyzing tools, e.g. for free surface moments and longitudinal strength

Intact stability

Intact stability calculations and comprehensive intact stability criteria analysis, intact stability limit curves

Damage stability

Damage stability calculations and comprehensive damage stability criteria analysis, damage stability limit curves

Flooding simulation

Simulation tools for analysis of water propagation in the ship after damage in time-domain considering the internal structures of the vessel

Rule compliance

Wide variety of rule compliance checks for design and calculations

Optimization

Comprehensive optimization to find the most efficient design variations

Offshore structure stability

Flexible modeling and calculation of floating structures, even for the most complicated geometries

Emergency response

Real-time marine salvage engineering tools

Submarine design

Comprehensive design tool for submarines on NAPA Designer

Software Packages for

3D Design

Definitions and Analysis

Hydrostatics and Stability

2D drawings

NAPA Designer is a powerful and interactive 3D design tool, supporting the hull form design, inner geometry and compartment modeling. The additional simple calculation tools assist the 3D design workflow, for example by providing the real-time hydrostatics and compartment capacities.

Besides of the powerful 3D modeling tools, the functionality of NAPA Designer covers also a part of the intact stability analysis, by having a toolset for creating and editing loading conditions. The application provides an easy-to-use and efficient user interface to handle several loading conditions at the same time, accompanied with the quick rule compliance analysis tools.

NAPA is complete naval architectural package for calculations and analysis. The functionality cover all capabilities listed above, such as the intact and damage stability analysis tools, including the complete SOLAS 2020 support. NAPA works hand-in-hand with NAPA Designer and its 3D modeling interface. The versatile and flexible user interface comes with the Manager application concept which for example enables clear calculation workflows, reporting and easy customization with the support of NAPA macros.

NAPA Drafting offers tools for efficient drawing generation directly from the 3D model. The application is based on the AutoCAD OEM technology, and it is available as a stand-alone software package (with AutoCAD Light) or as a plugin for the full AutoCAD software. NAPA Drafting supports for example the compartment intersections and automatically generated tank capacity tables.