earth science

Limits of Oceans and Seas

Limits of Oceans and Seas is a earth 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 Limits of Oceans and Seas rather than just read about it. In short: Limits of Oceans and Seas (French: Limites des Océans et Mers or Limites des Océans et des Mers, S-23) is a special publication of the International Hydrographic Organization (IHO) defining the names and borders of the oceans and seas. The publication serves as an international standard for hydrographic surveying and nautical charting and is also consulted by others involved in maritime activities.

Key takeaways

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

Reference excerpt

Limits of Oceans and Seas (French: Limites des Océans et Mers or Limites des Océans et des Mers, S-23) is a special publication of the International Hydrographic Organization (IHO) defining the names and borders of the oceans and seas. The publication serves as an international standard for hydrographic surveying and nautical charting and is also consulted by others involved in maritime activities. It is authored by the organization's secretariat, the International Hydrographic Bureau (IHB), and approved by IHO member states. It only covers sea surface features; undersea features are standardized in another IHO publication, the GEBCO Gazetteer of Undersea Feature Names. It is slated to be replaced by a digital dataset by 2026.

History A resolution at the 1919 International Hydrographic Conference called for the development of an international standard for defining maritime features. The IHB published the first edition of Limits of Oceans and Seas in 1928. Subsequent editions were published in 1937 and 1953. This third edition is currently in force. The third edition's age is recognized as a growing technical problem, but the IHO member states have been unable to reach agreement on updates to the standard due to political conflicts arising out of the United Nations Conference on the Law of the Sea. A fourth edition was drafted in 1986 and nearly approved. Further development of the working draft began in 1998. Changes included a new title, Names and Limits of Oceans and Seas, and new names for 60 seas. In August 2002, it was resubmitted to IHO member states for approval, with the intention of distributing it in both print and digital formats. However, voting was suspended the following month, pending agreement between South Korea and Japan regarding the international standard name of the sea called "Japan Sea" in the 1953 edition. The IHO subsequently began work on a digital map of sea limits, Polygonal Demarcations of Global Sea Areas Product Specification and Dataset (S-130), based on modern a geographic information system. In April 2019, diplomats from North and South Korea, the United Kingdom, the United States, and Japan met in private to resolve the Sea of Japan naming dispute. They agreed to adopt a system of numeric identifiers for seas and abandon efforts to revise S-23, leaving in place the analog publication during development of the digital dataset. On November 16, 2020, IHO member states adopted this compromise in a virtual session. The IHO plans to release S-130 by 2026.

References

External links

IHO Standards and Specifications Full text of the third edition 2002 draft of the fourth edition Polygonal Demarcations of Global Sea Areas Product Specification and Dataset (S-130) Project Team

Illustrations

Worked examples

Example 1 — a first encounter with Limits of Oceans and Seas

Start with the simplest possible case. Write down what Limits of Oceans and Seas claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In earth 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 Limits of Oceans and Seas 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 Limits of Oceans and Seas 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 Limits of Oceans and Seas

In research: Limits of Oceans and Seas appears in earth 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 Limits of Oceans and Seas 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: Limits of Oceans and Seas is common in secondary-school and first-year university syllabi. It links to neighbouring topics Government publications, International Hydrographic Organization, International standards, so understanding it makes those chapters shorter.
In everyday life: Look for Limits of Oceans and Seas 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 Limits of Oceans and Seas in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Limits of Oceans and Seas means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Limits of Oceans and Seas out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Limits of Oceans and Seas in simple terms?

Why does Limits of Oceans and Seas matter?

Because it connects several earth 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 Limits of Oceans and Seas?

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 Limits of Oceans and Seas.