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NAPA Release 2021.2

The new NAPA Release is now live!

NAPA Release 2021.2

We are excited to announce that our second NAPA Release of 2021 is now live. The latest updates to the release have been made to further enhance quality, performance and usability.

All the changes in the software can be found in the NAPA Release Notes 2021.2 document, which is delivered together with the installers.

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Improved Quality and Performance

The most important value of NAPA is reliability first. Reliable software solutions are a critical factor in maintaining high safety standards within the maritime industry and are often at the core of user requests.

In addition to the functional developments in NAPA Release 2021.2, we have also implemented hundreds of individual improvements and corrections in NAPA, NAPA Designer and NAPA Drafting. More than 150 of those updates have been developed in response to feedback from our users, with the aim of improving the quality, usability and performance of the software. The most relevant improvements and corrections have been listed in the NAPA Release Notes 2021.2 document, with a few of the most notable updates highlighted below.

Probabilistic Damage Stability Performance

The SOLAS 2020 stability calculation performance has increased due to the optimized selection of the cases to be included in the final results. The proportional effect is especially notable with the parallel damage stability calculation, performed by the PROB and Statutory Compliance Manager applications. However, the effect is also notable with the traditional sequential calculation. The improvement can lead to a 25% time saving in the stability calculation. The change does not affect to the calculation acc. to SOLAS 2009. More performance improvements have also been planned in the next releases for the parallel calculation.

The watertight and weathertight limits (maximum water levels), generated for the cases contributing to the total attained index, are also built faster. The water levels are used to limit the location of new unprotected and weathertight openings, in order to maintain the current total attained index. The total time savings achieved can be up to 75% with the external sea water levels and up to 50% with the local water levels in the compartments.

Manager Application Improvements

Several Manager applications have been improved through the addition of a wide set of error corrections and amendments. Many of the updates were implemented following feedback from NAPA users looking to improve the usability of the applications. We have also implemented more than 200 minor updates to the applications, with a particular focus on continuing to improve usability and quality.

Hydrostatic and Stability Calculations

NAPA Designer now comes with the functionality to visualize and define stability openings and opening arrangements, together with the 3D ship model. The visualization supports most of the opening types and arrangements for intact and damage stability analysis, including the critical points and cross-flooding devices. A new definition tool makes the interactive definition of critical points for the intact stability analysis simpler to operate for users.

NAPA Steel

Improvements on Structural Modeling

NAPA Steel functionality has been updated with a number of valuable additions to improve the modeling accuracy and efficiency. The new release includes improvements in the modeling of surface objects, stiffeners and openings, among many other updates.

For example, the addition of new Assignments tool will significantly improve the multi-user environment modeling. The main purpose of the tool is to guard the simultaneous use of objects. The tool does not lock or restrict the use of objects in an arrangement and makes it easier for a user to control the simultaneous editing of objects, while avoiding any unintentional losses of definitions.


Finite Element Meshing

The main improvements to the finite element meshing include updates to the stiffeners, main objects and supporting functionality for meshing. For example, main objects can be idealized as beam elements and stiffeners as shell elements. The bracket stiffeners can be included in the model with different options.

NAPA Release 2021.2

Bracket stiffener modeling options


The fully integrated rule calculation interface to DNV Nauticus Hull is now available as a beta version in NAPA Designer. Together with the OCX interface, the design iteration during the scantling to achieve rule compliance is now made possible without leaving NAPA Designer.

NAPA Release 2021.2

DNV Nauticus Hull Interface in NAPA Designer

CAD Component Sections in NAPA Designer and NAPA Drafting

NAPA Designer generates now sections lines of the imported CAD components. The same information is also available directly in NAPA Drafting where the 2D sections can be added from the CAD components into the drawings.

NAPA Release 2021.2

Imported CAD component sections in NAPA Designer (left) and NAPA Drafting (right)

General Functionality

NAPA Designer

Copying content between different versions and projects is now even easier with a new improved Copy Content tool in NAPA Designer. The tool enables a simple and effective route to copying full entities, such as full compartment arrangements or structure models with all references. Alternatively, single definitions, such as NAPA macros and tables from a version/project, can also be easily copied via the tool.

NAPA Release 2021.2

Copy Content in NAPA Designer

NAPA Drafting

NAPA Drafting has been updated to AutoCAD OEM 2021, containing several new features in the standard AutoCAD functionality. The previous NAPA Drafting versions have been based on AutoCAD OEM 2016.



More information on the updates can be found in NAPA Release Notes 2021.2.

Thank you for reading and Season’s Greetings from NAPA!


Ps. The new installers are available in NAPAnet for downloading, together with the relevant documentation.

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