The coin ceremony is an event which takes place at the keel laying, in the early stages of a ship's construction.
[1][2] The coins are not normally fixed in place and are often retrieved when the ship sails out of the dry-dock,[3] (although they are sometimes welded to the keel).
[4] The mast stepping ceremony is a similar event which occurs towards the end of a ship's construction, and involves the placing of coins underneath the mast of a ship.
In shipbuilding today, the coins are normally welded beneath the radar mast.
This article related to water transport is a stub.