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NAPA User Meeting 2019

June 4, 2019 (9:00 am) – June 6, 2019 (4:00 pm)

Clarion Hotel Helsinki, Finland
Tyynenmerenkatu 2, 00220 Helsinki
(Accommodation details at the end of the page)

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Meeting Fee 1000 EUR (+ VAT 24 %). For all non-Finnish companies VAT is nondeductible.

We have a few open seats left!

We are happy to invite you to join us for the NAPA User Meeting 2019.  The meeting will provide useful information concerning NAPA’s recent and future developments, as well as opportunities for learning new ways to use NAPA.

Discussions with colleagues and NAPA personnel will provide an excellent forum for sharing ideas. As always, the Get-Together Party and dinners offer more relaxed settings for meeting old friends and making new ones.

Program Overview

Tuesday, June 4         General presentations and workshop sessions
Wednesday, June 5   Workshop sessions, NAPA Labs and general presentations
Thursday, June 6       Hands-on training sessions and face-to-face meetings with NAPA staff

Hot Topics and Contents

  • Interesting customer stories with NAPA Optimization and NAPA Steel
  • Application of NAPA Flooding Simulation for a detailed analysis of SOLAS damage stability results
  • New hull form and surface modelling tools in NAPA Designer
  • FEM in NAPA Designer
  • Meet the NAPA developers and see the new development topics at NAPA Labs: A great opportunity to test new beta level features and affect to the development of NAPA
  • Overview of latest NAPA Releases
  • Informative workshop sessions
  • Hands-on user training sessions
  • Meetings with NAPA Staff (To be requested in advance, please contact

Please take a look at the preliminary program below for more information.

Preliminary Program

Monday, June 3

Get-Together Party at 19:00 – 23:00 at Clarion Hotel


Tuesday, June 4

Time Subject
09:00 – 10:30 NAPA User Meeting 2019 begins with the welcome words!
Ilmo Kuutti, Mikko Kuosa, NAPA

NAPA Product News
Jan Mattsson, NAPA

10:30 – 11:00 Coffee break
11:00 – 12:30 Application of Flooding Simulation for a Detailed Analysis of SOLAS Damage Stability Results
Daniel Lindroth, NAPA

At present, probabilistic damage stability calculations in SOLAS Ch II-1 use simplified methods for defining the intermediate stages of flooding. Consequently, cross-flooding and progressive flooding through A-class fire proof boundaries are studied independently. By simulating the flooding progression, the artificial construction of flooding in stages and potential alternative flooding scenarios can be avoided.

Digital Twin for Monitoring Remaining Fatigue Life of Critical Hull Structures
Tapio Hulkkonen, Teemu Manderbacka, NAPA

Current technology in weather and environment, monitoring combined with the open AIS information available for tracking ships in service has opened possibilities for estimating the real environmental history of a ship experienced during her lifetime. When this big data is processed with advanced analyses and combined with the digital twin of a real ship in operation, it will open possibilities for estimating valuable and important information, such as the remaining fatigue life for ship structures.

Design Optimization of Floating Offshore Wind Turbine Support based on Genetic Algorithm Methodology
Evgeny Andreev, Doris Engineering

The support of a floating offshore wind turbine is a keystone to get an economically viable project. A good concept implies to have the lightest weight of material, a good restoring force, and a dynamic behaviour compatible with the wind turbine to be supported. It means that we are facing a complex optimization problem with tens of variables and multiple objectives to achieve.

Managing Design Complexity for Cruise Vessels with NAPA Steel
Michael Zimmermann, MV Werften

The design of large cruise vessels is a complex task where many disciplines need to be developed according to respective requirements and where all systems have to be integrated into one common ship structure. At MV Werften a new approach is developed which uses NAPA Steel as a central tool for a streamlined concept and basic design, to improve data integrity and data consistency but also to a reduce error rate in design.

12:30 – 13:40 Lunch break


Time NAPA Naval Architecture NAPA Steel
13:40 – 15:00 Design Method for Efficient Cross-flooding Arrangements on Passenger Ships
Pekka Ruponen, NAPA

Asymmetric flooding condition increases the risk of capsizing for a damaged ship. For this reason, efficient cross-flooding arrangements are needed. This is important, especially for passenger ship designs with double skin or large U-shaped voids in several watertight compartments.This presentation presents an advanced method, utilizing time-domain flooding simulation, for design and analysis of cross-flooding devices. Special attention is paid on the selection of the damage scenarios that are used in the assessment of the efficiency of the cross-flooding arrangements. The presented method can be used to confirm the assumption of instantly flooded rooms for probabilistic SOLAS damage stability calculations.

Advantages of Flooding Simulation in Verification of Design
Davide Camporese, Studio Engineering

NAPA flooding simulation offers great opportunities in design optimization of voids in lower decks areas. SOLAS damage stability regulations require that a damage can be considered instantaneous whether its equalization is completed within 60 seconds. The importance of instantaneous flooding consists of considering only the final stage of flooding which gives better results in stability index values.

NAPA flooding simulation, with its time-based analysis, makes a better description of the physical equalization process and gives to the designer one more tool to satisfy SOLAS requirements without geometrical changes and improve stability index.

Application of NAPA for a Landing Platform Dock
Bagus Puji Laksono, PT.PAL Indonesia

A Landing Platform Dock (LPD), as a large ship, has generally a deep draught, and therefore a Landing Craft Utility (LCU) is a vessel commonly carried by the LPD to support the embarkation or amphibious operation. The LCU is launched from the stern of the LPD which consequently requires an aft trim condition to be able to float the LCU.

The presentation will focus on improving ship stability and hydrodynamics of a Landing Platform Dock, by using NAPA.

Swift Move from Naval Architecture NAPA model to NAPA Steel Model
Jung Dong Uk, Daewoo Shipbuilding and Marine Engineering (DSME)

DSME has been developing many NAPA Manager applications for NAPA Naval Architectural (NA) models. Now we are seeking the chance to support NAPA Steel models from NAPA NA model with same manner of NAPA Manager Applications.

The DSME LNGC Manager application is one of the examples for showing that a NAPA Manager application can share the geometry information with two models and improve the productivity without hurting the strength of NAPA Designer.

Latest news on 3D Model Based Approval
Tapio Hulkkonen, NAPA

Classification societies are currently developing their plan approval processes towards a 3D Model Based Approval. This will have an effect in the future on structural basic design and change the work scope and role of drawings in plan approval. The presentation will highlight some ongoing projects at classification societies and how NAPA is participating those and developing tools to support this trend.

Wide Range of Modeling Functions of NAPA Designer
Jani Merikanto, NAPA

The powerful tools of NAPA Designer for structural modelling including the latest development.

FEM in Designer
Lasse Helenius, NAPA

A NAPA Steel geometry model can be converted into a good quality finite element (FE) mesh for further processing by using the latest tools of NAPA Designer for FE meshing.

Hull Weight Estimation and Structural Basic Design by NAPA Steel
Kim Ju Won, Daewoo Shipbuilding and Marine Engineering (DSME)

It’s very important to create a structural arrangement and estimate the hull weight quickly for a new design, in an early design stage. By using the powerful functions of 3D modeling of NAPA, the Panamax size vessels have been modeled in 2-3 weeks, with simultaneously completing well also the initial scantlings and weight estimation.

Once the NAPA model has been completed, it is the only solution for the weight estimation corresponding the repeated modifications of the hull form, arrangement and scantlings.

15:00 – 15:30 Coffee break Coffee break


Time Subject
15:30 – 17:00 First Workshop Sessions
N1: Hull Form Modelling in NAPA Designer
N3: Damage Stability Calculations
S1: NAPA Steel in NAPA Designer

More detailed workshop descriptions can be found below.

Dinner at 19:00 – 23:00 at Restaurant NJK


Wednesday, June 5

Time Subject
09:00 – 10:30 Second Workshop Sessions
N3: Damage Stability Calculations
N4: Custom NAPA Manager Application
S2: NAPA Designer Plugin & C# scripting

More detailed workshop descriptions can be found below.

10:30 – 11:30 Coffee break
11:00 – 12:30 Third Workshop Sessions
N2: Intact Stability FAQ
N5: Optimization
S3: Classification Drawings with NAPA

More detailed workshop descriptions can be found below.

12:30 – 13:40 Lunch break
13:40 – 15:00 NAPA Labs
15:00 – 15:30 Coffee break


Time NAPA Naval Architecture NAPA Steel
15:30 – 16:30 Hull form in NAPA Designer
Jukka Määttänen, NAPA

Development of the new hull form modelling tools in Designer was started in 2018. This presentation will demonstrate the features&functionality which are already released, and what are the development plans, and finally, what is our vision on the hull form modelling tool-set in NAPA Designer.


Stability in NAPA Designer
Aappo Pulkkinen, Jaakko Carlstedt, NAPA

We have been developing the new functions for stability calculations in NAPA Designer. We will present some highlights of the on-going development.


NAPA Voyage Optimization: How ship designers benefit from weather routing
Claus Stigler, NAPA

Having knowledge about expected weather conditions and operational profiles helps enhancing the design of a vessel. This presentation introduces the NAPA Voyage Optimization API together with its main graphical user interface – the web application NAPA Voyage Optimization – and demonstrates on how the utilization of such calculations can be beneficial for ship designers.


Interfacing News
Lakshmi Juttu, Joonas Kuusela, NAPA

The NAPA Steel model can be exported to all major classification society rule check software and various production systems. This presentation gives an insight to the latest development in rule interfaces and interfaces to production systems. The NAPA Steel Aveva interface development will be presented by Prostep.

NAPA Drafting in Wärtsilä Ship Design
Pawel Kolodziejczyk, Wärtsilä Ship Design Norway

The final result of 3D structure model is drawings. Wärtsilä Ship Design uses NAPA Drafting application in AutoCAD, connected to NAPA model with the specific settings, to produce final drawings. This procedure improves the quality of class documents (drawings and calculations). The presentation concentrates on how NAPA Drafting has been implemented in the standard way of working at Wärtsilä Ship Design.

Development of Hull Weight Estimation Program using NAPA Steel
Jung Hwa Ahn, Hyundai Heavy Industries (HHI)

Hull weight estimation is generally implemented by using the data from similar vessels. Recently, the demand for new ship types has been increased and this has brought some difficulties to the hull weight estimation.

HHI has developed a weight estimation program for the accurate hull weight calculation, based on NAPA 3D model. This program can automatically generate a NAPA 3D model for weight estimation on an instant using graphical user interface and regular design library.
After the model has been created, the hull weight can be calculated from the model quickly. It is expected that the new program can reduce modeling time about 50 % and improve the estimation accuracy for new ship types.

16:30 – 16:35 Short break Short break


Time Subject
16:35 – 17:00 Better User Experience with NAPA
Olli Puustinen, NAPA

Final Words of NAPA User Meeting 2019
Jan Furustam, NAPA

Closing Party at 19:00 – 23:00 at Allas SeaPool’s Wine and Dine


Thursday, June 6

Time Subject Alternative
09:00 – 10:30 Training Sessions
T1: NAPA Macro Programming
T2: Geometry Modelling in NAPA Designer
Meetings with NAPA Staff*
10:30 – 11:00 Coffee break Coffee break
11:00 – 12:30 Training Sessions continue Meetings with NAPA Staff*
12:30 – 13:40 Lunch break Lunch break
13:40 – 15:00 Meetings with NAPA Staff* Meetings with NAPA Staff*

* The face-to-face meetings with NAPA Staff should to be booked in advance.

** This is a preliminary program and some modifications may still be expected.

Workshops on Tuesday and Wednesday

NAPA Naval Architecture

  • N1: Hull Form Modelling in NAPA Designer – Hands-on workshop session to create a hull form by using the new tools in NAPA Designer / Antti Pösö, Jukka Määttänen, Janne Mankila, NAPA
  • N2: Intact Stability FAQ – The most frequently asked questions regarding the intact stability calculations in NAPA / Dorin Chiracu, Markus Tompuri, NAPA
  • N3: Damage Stability Calculations – SOLAS 2020, parallel damage stability calculation and the most frequently asked questions regarding the damage stability calculations in NAPA / Olli Puustinen, Daniel Lindroth, NAPA
  • N4: NAPA Manager Application – Hands-on workshop on how to create a custom NAPA Manager application. An example of a custom application presented by Thomas Guesnet, GST. / Reino Külaots, NAPA
  • N5: Optimization – Hands-on workshop on how to set up an optimization framework in NAPA / Vesa Uppala, NAPA

NAPA Steel

  • S1: NAPA Steel in NAPA Designer: NAPA Steel structural modelling in NAPA Designer / Tapio Seppälä, Marius Irimia, NAPA
  • S2: NAPA Designer Plugin & C# scripting – Hands-on workshop session to get an introduction to the scripting in NAPA Designer / Antti Kujala, Francesco Oneto, NAPA
  • S3: Classification Drawings with NAPA – How to produce classification drawings with NAPA Drafting / Timo Huuskonen, Mika Jaatinen, NAPA

Hands-on Trainings on Thursday

  • T1: NAPA Macro programming by using the latest tools such as NAPA Macro Editor / Dorin Chiracu, Iuliana-Gabriela Voinic, NAPA
  • T2: Geometry modelling in NAPA Designer for Naval Architectural use / Marius Irimia, Timo Huuskonen, NAPA


Please remember to book your accommodation early – June is a high season in Helsinki.

Clarion Hotel Helsinki offers accommodation for the NAPA User Meeting delegates at special rates as follows. Special room rate is valid until 20 May. Remember to mention
NAPA User Meeting to obtain the special price.

  • Standard King for 1 person EUR 175 / night (sold out)
  • Standard King for 2 person EUR 195 / night
  • Superior King for 1 person EUR 195 / night
  • Superior King for 2 person EUR 205 / night

Prices include VAT and buffet breakfast, Top Floor Gym, sauna and pool. Please note that the special rates are valid for the NAPA User Meeting period, (check in: Monday June 3; check out: Thursday June 6).

Please make your room reservation directly to the hotel:

Clarion Hotel Helsinki
Tyynenmerenkatu 2, 00220 Helsinki

Tel. +358 10 850 3820

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