science

Maritime mobile service

Maritime mobile 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 service rather than just read about it. In short: A maritime mobile service (also MMS or maritime mobile radiocommunication service) is a mobile service between coast stations and ship stations, or between ship stations, or between associated on-board communication stations. The service may also be used by survival craft stations and emergency position-indicating radiobeacon stations.

Key takeaways

Maritime mobile 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 service to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Maritime mobile service from memory before moving on to harder problems.

Reference excerpt

A maritime mobile service (also MMS or maritime mobile radiocommunication service) is a mobile service between coast stations and ship stations, or between ship stations, or between associated on-board communication stations. The service may also be used by survival craft stations and emergency position-indicating radiobeacon stations.

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

Maritime mobile service Maritime mobile-satellite service (article 1.29) 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 (see example below) secondary allocation: is indicated by small letters exclusive or shared utilization: is within the responsibility of administrations However, military usage, in bands where there is civil usage, will be in accordance with the ITU Radio Regulations. In NATO countries military utilizations will be in accordance with the NATO Joint Civil/Military Frequency Agreement (NJFA).

Frequency range

415... 495 kHz 505...526,5 kHz 1606,5...1625 kHz 1635...1800 kHz 2045...2160 kHz 2170...2173,5 kHz 2190,5...2194 kHz 2625...2650 kHz 4000...4438 kHz 6200...6525 kHz 8100...8815 kHz 12230...13200 kHz 16360...17410 kHz 18780...18900 kHz 19680...19800 kHz 22000...22855 kHz 25070...25210 kHz 26100...26175 kHz

See also Radio station Radiocommunication service

References

Illustrations

Worked examples

Example 1 — a first encounter with Maritime mobile service

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

In research: Maritime mobile 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 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 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 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.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Maritime mobile service” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Maritime mobile service in 20 minutes

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

Frequently asked questions

What is Maritime mobile service in simple terms?

Why does Maritime mobile 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 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 service.