Seakeeping performance
General information
The seakeeping performance accounts for the performance of ships in wind, waves and current. The performance can be expressed in terms of comfort, crew workability, damage to ship and cargo (see seakeeping standards) due to slamming and green water and in the end the earning capacity of the ship including the added resistance.

Services & Activities
The seakeeping performance can be assessed by means of an operability assessment where for instance the downtime and schedule reliability can be established. A dedicated selection of model tests in MARIN's Seakeeping & Manoeuvring Basin improves the accuracy of such an assessment considerably, because a number of issues are difficult to calculate or even beyond today’s capabilities of numerical tools. Examples are the behaviour at low wave encounter frequencies where steering and stability issues become important and slamming and the related increase in accelerations and bending moments.

The Trials & Monitoring Department can be involved in full-scale measurements to assess seakeeping performance.

Facilities & Tools
Seakeeping performance is tested in the following MARIN facilities:

Seakeeping performance is assessed by the tools Guiliver, safetrans, waso, shipmo, FREDYN and SHIPMO. Details on these tools can be found here.

Experience record
Seakeeping performance is established in most of the seakeeping projects. Varying from sustained speed calculations to dedicated operability assessments after seakeeping model tests including comfort and safety issues

Most recent Seakeeping performance papers presented by MARIN:
(complete overview of papers can be found under Publications)

Research into the Effects of Motion Simulation on Tugboat Captain Training and Performance in Bridge Simulators
D. ten Hove and M. Roza, HPAS2010: Human Performance At Sea, 2010

Analysis of the Tunnel Immersion for the Busan-Geoje Fixed Link Project Through Scale Model Tests and Computer Simulations
Hans Cozijn (MARIN) and Jin Wook Heo (Daewoo Engineering and Construction, Ltd.), OMAE Conference, Honolulu, 2009

Bow flare slamming of container ships and it's impact on operational reliability
R. P. Dallinga, RINA, 2006

Real Time Data for Structural Integrity and Stability Assessment: A GoM Case Study
Mitchell, M., Tipton, E., van Dijk, R.R.T. (MARIN) and Allen, B., Society of Petroleum Engineers (SPE), 2006

The Behaviour of Tugs in Waves Assisting LNG Carriers During Berthing Along Offshore LNG Terminals
Bas Buchner, Pieter Dierx and Olaf Waals, OMAE Conference, Halkidiki, 2005

Most recent Seakeeping performance articles written for MARIN Report:
(complete overview of articles can be found under Publications)

Significant upgrade of Anti Roll Tank (ART) design services
Michiel Gunsing, Bastien Abeil & Nicolas Carette, MARIN Report, 2013

Hydrodynamic software suites make design concept evaluation more efficient
Arno Bons & Arie de Wit, MARIN Report, 2013

Retrofitting for energy savings and emissions reduction
Patrick Hooijmans, MARIN Report, 2013

OBELICS JIP successfully achieves goals
Ron Schoon & Eelco Frickel, MARIN Report, 2013

First images of cavitation and ventilation in waves
Gerco Hagesteijn & Joris Brouwer, MARIN Report, 2012

Contact
For more information on how MARIN can help your organisation with Seakeeping performance assessments, please contact the knowledge group Seakeeping at seakeeping@marin.nl or the Trials & Monitoring department at trials@marin.nl

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