The search results provide various accounts of missing rudder sections being found, but none directly answer the question about a specific missing rudder section. However, one relevant story is about the missing piece of HMS Invincible shipwreck, which was found by a team led by Bournemouth University, lying sixty meters from the original wreck site. The rudder was complete from top to bottom and is over 3 meters tall, indicating that thorough searches can eventually lead to the discovery of missing parts. While this doesn't directly answer the question, it does provide an example of how missing rudder sections can be found. For more specific information, further details about the rudder in question would be needed. Missing piece of HMS Invincible shipwreck uncovered