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Lighthouse and naval vessel urban legend

Lighthouse and naval vessel urban legend is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Lighthouse and naval vessel urban legend rather than just read about it. In short: The lighthouse and naval vessel urban legend describes an encounter between a large naval ship and what at first appears to be another vessel, with which the ship is on a collision course. The naval vessel, usually identified as of the United States Navy or the United Kingdom's Royal Navy and generally described as a battleship or aircraft carrier, requests that the other ship change course.

Lighthouse and naval vessel urban legend — main illustration
Lighthouse and naval vessel urban legend — illustration

Key takeaways

  • Lighthouse and naval vessel urban legend belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Lighthouse and naval vessel urban legend to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Lighthouse and naval vessel urban legend from memory before moving on to harder problems.

Reference excerpt

The lighthouse and naval vessel urban legend describes an encounter between a large naval ship and what at first appears to be another vessel, with which the ship is on a collision course. The naval vessel, usually identified as of the United States Navy or the United Kingdom's Royal Navy and generally described as a battleship or aircraft carrier, requests that the other ship change course. The other party, generally identified as Canadian or often Irish and occasionally Spanish, responds that the naval vessel should change course, whereupon the captain of the naval vessel reiterates the demand, identifying himself and the ship he commands and sometimes making threats. This elicits the response "I'm a lighthouse. Your call." or something similar, a punchline which has become shorthand for the entire anecdote. It has circulated on the Internet and elsewhere in particular since a 1995 version that was claimed to be a transcript of such a communication released by the office of the U.S. Chief of Naval Operations. There is no evidence that the event actually took place, and the account is implausible. It is thus considered an urban legend, a variation on a joke that dates to at least the 1930s, sometimes referred to as "the lighthouse vs. the carrier" or "the lighthouse vs. the battleship". The U.S. Navy once had a webpage debunking it, although this did not stop the former U.S. Director of National Intelligence Mike McConnell using it as a joke in a 2008 speech. Other speakers have often used it simply as a parable teaching the dangers of inflexibility and self-importance, or the need for situational awareness. In 2004, a Swedish company dramatized it in an award-winning television advertisement.

Example A commonly circulated version goes thus:

This is the transcript of a radio conversation of a US naval ship with Canadian authorities off the coast of Newfoundland in October, 1995. Radio conversation released by the Chief of Naval Operations 10-10-95. Americans: Please divert your course 15 degrees to the North to avoid a collision. Canadians: Recommend you divert YOUR course 15 degrees to the South to avoid a collision. Americans: This is the Captain of a US Navy ship. I say again, divert YOUR course. Canadians: No. I say again, you divert YOUR course. Americans: This is the aircraft carrier USS Lincoln, the second largest ship in the United States' Atlantic fleet. We are accompanied by three destroyers, three cruisers and numerous support vessels. I demand that YOU change your course 15 degrees north, that's one five degrees north, or countermeasures will be undertaken to ensure the safety of this ship.

Canadians: This is a lighthouse. Your call. Other vessels sometimes named in the transcript include the carriers Enterprise, Coral Sea and Nimitz, and the Missouri, a battleship. The location of the exchange has also sometimes been claimed to be Puget Sound along the northwestern coast of the U.S. state of Washington, or off the coast of North Carolina, some other times the lighthouse is located at Cape Finisterre in Spain. The Spanish version expands the joke by having the lighthouse keeper respond to the aircraft carrier's inventory of the fleet by saying he's accompanied by "our dog, our food, two beers, and a canary that's currently asleep." Some versions relocate it to the Irish or Scottish coasts; in the former case the ship is sometimes identified as British, with the conversation taking place off the coast of County Kerry, Ireland, in 1998. There is sometimes an additional line of dialogue where the lighthouse keeper tells the ship captain he is a Seaman First Class before the final exchange. The prefatory information sometimes notes it was released in response to a request under the Freedom of Information Act, or names Jeremy Boorda, the incumbent Chief of Naval Operations on the stated date.

Debunking The Virginian-Pilot, the daily newspaper in Norfolk, Virginia, a city with a large naval presence, investigated the story after it had begun circulating extensively on and off the Internet in 1995. A spokesman for the Atlantic Fleet called it "a totally bogus story". Boorda's office said it had not released any such transcript on the date in question. And not only was the story an old one, the ships commonly named in it were mostly either out of service by 1995 (the Coral Sea, for example, had been scrapped two years before) or not aircraft carriers. Other sources the paper consulted found more flaws with the story. A spokesman for the Coast Guard, which operates all American lighthouses, said that they had all long since been automated, so there would have been no keeper to talk to a ship, if the incident had taken place in US waters. He speculated that it had been circulated by members of the Coast Guard to make fun of the Navy. Four years later, in response to a report that a consultant continued to tell the story at speeches as if it were true, Fast Company talked to Wayne Wheeler, a former Coast Guardsman who was then head of an enthusiasts' group called the US Lighthouse Society. He confirmed that it was an old story, and that in his experience an incident of this type involving lighthouses was highly unlikely:

First, a lighthouse doesn't look anything like a ship. Unless the weather's really foggy—and most versions of the story don't mention fog – you can see a lighthouse from far away as a fixed white light that flashes at a set number of seconds. On the other hand, ships are usually moving and have smaller, colored lights at the fore and aft. There's absolutely no way to mistake one for the other. A Canadian lighthouse keeper, Jim Abram of British Columbia, agreed. "I've been lighthouse keeping for 21 years, ... and no one's ever thought that I was in anything but a lighthouse." The Military Officers Association of America (MOAA) calls it "easily believable if you are not familiar with how the Navy operates or simple things such as GPS." In addition to the historical inaccuracies with most of the ships named, the organization notes on its blog the extreme improbability that an aircraft carrier's crew would not realize they were off the coast of a landmass such as Newfoundland. The MOAA claimed, in 2009, to receive it in forwarded email an average of three times a day. "[After] fifty times the only interesting part about it is to see which details have been changed."

… excerpt ends here. Continue reading the full article.

Illustrations

Lighthouse and naval vessel urban legend illustration
Lighthouse and naval vessel urban legend illustration

Worked examples

Example 1 — a first encounter with Lighthouse and naval vessel urban legend

Start with the simplest possible case. Write down what Lighthouse and naval vessel urban legend claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Lighthouse and naval vessel urban legend before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Lighthouse and naval vessel urban legend ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Lighthouse and naval vessel urban legend

In research
Lighthouse and naval vessel urban legend appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Lighthouse and naval vessel urban legend in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Lighthouse and naval vessel urban legend is common in secondary-school and first-year university syllabi. It links to neighbouring topics American urban legends, British urban legends, Egoism, so understanding it makes those chapters shorter.
In everyday life
Look for Lighthouse and naval vessel urban legend outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Lighthouse and naval vessel urban legend in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Lighthouse and naval vessel urban legend means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Lighthouse and naval vessel urban legend out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Lighthouse and naval vessel urban legend in simple terms?

The lighthouse and naval vessel urban legend describes an encounter between a large naval ship and what at first appears to be another vessel, with which the ship is on a collision course. The naval vessel, usually identified as of the United States Navy or the United Kingdom's Royal Navy and gener…

Why does Lighthouse and naval vessel urban legend matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Lighthouse and naval vessel urban legend?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Lighthouse and naval vessel urban legend.

Tags

  • American urban legends
  • British urban legends
  • Egoism
  • Lighthouses
  • Maritime culture
  • United States Navy

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