Primarily in the United States Navy, a plankowner is a member of the crew of a ship when it's first commissioned. Historically, a plankowner or his widow could petition the Naval Historical Center's Curator Branch when the ship was decommissioned, and receive a piece of the deck; this does not apply to modern ships with metal decks, however.
References
Current US Navy policy on plankowning (http://www.chinfo.navy.mil/navpalib/questions/plnkownr.html)
This dates from the time of wooden sail ships when the name of the maiden crew was inscribed onto a plank in the ship's structure.
Historically, a plankowner or his widow could petition the Naval Historical Center's Curator Branch when the ship was decommissioned and recieve a piece of the deck; this does not aply to modern ships with metal decks, however.
Sailors who are plankowners at their current command often have the word "PLANKOWNER" embroidered on the back of their uniform ball cap to denote this designation.
Primarily in the United States Navy, a plankowner is a member of the crew of a ship when it is first commissioned.
Historically, a plankowner or his widow could petition the Naval Historical Center's Curator Branch when the ship was decommissioned, and receive a piece of the deck; this does not apply to modern ships with metal decks, however.