science

South Reef

South Reef 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 South Reef rather than just read about it. In short: South Reef (Filipino: Bahura ng Timog Peligro); Nam Reef (Vietnamese: Đá Nam); Mandarin Chinese: 奈羅礁; pinyin: Nàiluó jiāo, is a reef on the southern part of the North Danger Reef of the Spratly Islands in the South China Sea. The reef has been occupied by Vietnam since 1988.

Key takeaways

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

Reference excerpt

South Reef (Filipino: Bahura ng Timog Peligro); Nam Reef (Vietnamese: Đá Nam); Mandarin Chinese: 奈羅礁; pinyin: Nàiluó jiāo, is a reef on the southern part of the North Danger Reef of the Spratly Islands in the South China Sea. The reef has been occupied by Vietnam since 1988. It is also claimed by China (PRC), the Philippines, Vietnam, and Taiwan (ROC). On the coral reef is a floating architectural complex called Nam Island, built in 1988, which serves as a military base for the Vietnamese Navy. The geographical coordinates inscribed on the sovereignty marker are 11°30′0″N 114°21′0″E. Soldiers stationed here collect rainwater for livestock and vegetable cultivation. In 2019, a multi-purpose cultural center was inaugurated and put into use on Nam Rock Island. In October 2023, Vietnam began dredging and reclaiming Nam Island into an artificial island. As of March 2025, the island has been reclaimed to an area of approximately 60 hectares, with a length of approximately 1.9 kilometers and a harbor spanning approximately 40 hectares.

Illustrations

Worked examples

Example 1 — a first encounter with South Reef

Start with the simplest possible case. Write down what South Reef 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 South Reef 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 South Reef 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 South Reef

In research: South Reef 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 South Reef 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: South Reef is common in secondary-school and first-year university syllabi. It links to neighbouring topics Asia geography stubs, Disputed reefs, Island stubs, so understanding it makes those chapters shorter.
In everyday life: Look for South Reef 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 South Reef in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what South Reef 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 South Reef out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is South Reef in simple terms?

Why does South Reef 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 South Reef?

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 South Reef.