science

Maritime mobile-satellite service

Maritime mobile-satellite service 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 Maritime mobile-satellite service rather than just read about it. In short: Maritime mobile-satellite service (MMSS, or maritime mobile-satellite radiocommunication service) is – according to Article 1.29 of the International Telecommunication Union's Radio Regulations (RR) – "A mobile-satellite service in which mobile earth stations are located on board ships; survival craft stations and emergency position-indicating radiobeacon stations may also participate in this service", in addition t…

Key takeaways

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

Reference excerpt

Maritime mobile-satellite service (MMSS, or maritime mobile-satellite radiocommunication service) is – according to Article 1.29 of the International Telecommunication Union's Radio Regulations (RR) – "A mobile-satellite service in which mobile earth stations are located on board ships; survival craft stations and emergency position-indicating radiobeacon stations may also participate in this service", in addition to serving as navigation systems.

Classification This radiocommunication service is classified in accordance with ITU Radio Regulations (article 1) as follows: Mobile service

Maritime mobile service (article 1.28) Maritime mobile-satellite service Port operations service (article 1.30) Ship movement service (article 1.31)

Frequency allocation The allocation of radio frequencies is provided according to Article 5 of the ITU Radio Regulations (edition 2012). In order to improve harmonisation in spectrum utilisation, the majority of service-allocations stipulated in this document were incorporated in national Tables of Frequency Allocations and Utilisations which is with-in the responsibility of the appropriate national administration. The allocation might be primary, secondary, exclusive, and shared.

primary allocation: is indicated by writing in capital letters secondary allocation: is indicated by small letters exclusive or shared utilization: is within the responsibility of administrations Example of frequency allocation

Selection of MMSS stations

See also Radio station Radiocommunication service

References / sources

Illustrations

Worked examples

Example 1 — a first encounter with Maritime mobile-satellite service

Start with the simplest possible case. Write down what Maritime mobile-satellite service 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 Maritime mobile-satellite service 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 Maritime mobile-satellite service 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 Maritime mobile-satellite service

In research: Maritime mobile-satellite service 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 Maritime mobile-satellite service 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: Maritime mobile-satellite service is common in secondary-school and first-year university syllabi. It links to neighbouring topics Maritime communication, Mobile services ITU, Radio communications stubs, so understanding it makes those chapters shorter.
In everyday life: Look for Maritime mobile-satellite service 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 Maritime mobile-satellite service in 20 minutes

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

Frequently asked questions

What is Maritime mobile-satellite service in simple terms?

Why does Maritime mobile-satellite service 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 Maritime mobile-satellite service?

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 Maritime mobile-satellite service.