Depicted is the 'retired' HNLMS 'Mercuur'. The Mercuur is a former Dutch ocean minesweeper. She (as ships are female) came to the Netherlands from the US as HNLMS 'Onverschrokken' (Onverschrokken stands for Fearless) in 1954. She was later converted into a torpedo work ship and renamed HNLMS 'Mercuur'. She was the oldest wooden minesweeper of the Royal Netherlands Navy and is now a living history museum ship in Flushing, Zeeland, The Netherlands.

The HNLMS 'Mercuur' is maintained and restored by volunteers of the 'Stichting Maritiem Erfgoed Vlissingen' (Maritime Heritage Foundation Flushing).

Edit:

I have been asked why this ship is made of wood. I will try to answer this.

Only the ship's hull is made of wood. In the past, many sea mines used the magnetic properties of steel ship hulls to detonate these mines due to the magnetic influence principle with the intention of sinking these ships. In order to defuse these types of mines, there are certain methods available used by minesweepers. After that, it's a must that these minesweepers are equipped with wooden hulls. Their deck houses are often made of aluminum (being a non-magnetic metal). Tools/equipment are also made of non-ferrous material. In this way, one tries to prevent the premature explosion of a detected sea mine near a minesweeper at all costs.

Modern sea mines have undergone a technical development, which has not only made them more 'sophisticated', but even more dangerous.