Methodology for collision-frequency analysis of wind-turbine installation vessels

Sang Jin Kim*, Jung Kwan Seo, Kuk Yeol Ma, Joo Shin Park

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)


Collisions frequently occur at sea, leading to serious human injury, and damage to property and the environment. Furthermore, the increasing number of offshore platforms means that collisions between vessels and offshore structures are a frequent type of accident. Platforms are at a greater risk of collisions than ships, because they have no avoidance capability when operating. Recently, the expansion of offshore wind farms in response to new green energy requirements has led to wind-turbine installation vessels (WTIVs) being in common use. WTIVs are similar to fixed jack-up rigs, and they are self-propelled because they must be able to quickly relocate during wind-farm operation. Therefore, it is important to consider the operational characteristics of WTIVs when calculating their collision risks. This study develops a new method for analysing WTIV collision frequency and then compares the proposed method with the existing methods. It also discusses the implications of the methods for ship-WTIV collision-frequency analysis.

Original languageEnglish
Pages (from-to)423-439
Number of pages17
JournalShips and Offshore Structures
Issue number4
Early online date5 Mar 2020
Publication statusPublished - 2021
MoE publication typeA1 Journal article-refereed


  • collision frequency
  • Offshore platforms
  • passing/drifting/attendant vessel collisions
  • wind-turbine installation vessel


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