science

Have Quick

Have Quick 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 Have Quick rather than just read about it. In short: Have Quick (also HAVEQUICK, short HQ) was an ECM-resistant frequency-hopping system used to protect military aeronautical mobile (OR) radio traffic. Since the end of World War II, U.S. and Allied military aircraft have used AM radios in the NATO harmonised 225–400 MHz UHF band (part of NATO B band) for short range air-to-air and ground-to-air communications.

Key takeaways

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

Reference excerpt

Have Quick (also HAVEQUICK, short HQ) was an ECM-resistant frequency-hopping system used to protect military aeronautical mobile (OR) radio traffic. Since the end of World War II, U.S. and Allied military aircraft have used AM radios in the NATO harmonised 225–400 MHz UHF band (part of NATO B band) for short range air-to-air and ground-to-air communications. During development and the procurement of UHF radios, military planners did not require features to secure communications for aircraft and helicopters from jamming until the post-Vietnam War era. Progress in electronics in the 1970s reached a point where anyone with an inexpensive radio frequency scanner or receiver set could intercept military communications. Once the target frequencies were identified, radio frequency jamming could easily be employed to degrade or completely disable communications. The Have Quick program was a response to this problem. Engineers recognized that newer aircraft radios already included all-channel frequency synthesizers along with keyboards and displays for data entry. The only other system requirements to achieve the desired anti-jam functionality were an accurate clock (for timed synchronization) and a microprocessor to add frequency hopping to existing radios. Aircraft and ground radios that employed HAVE QUICK needed be initialized with accurate time of day (TOD; usually from a GPS receiver), a word of the day (WOD), and a net identifier (providing mode selection and multiple networks to use the same word of the day). A word of the day is a transmission security variable that consists of six segments of six digits each. The word of the day was loaded into the radio or its control unit to key the HAVE QUICK system to the proper hopping pattern, rate, and dwell time. The word of the day, time of day and net identifier are input to a cryptographic pseudorandom number generator that controls the frequency changes. HAVE QUICK is not an encryption system, though many HAVE QUICK radios can be used with encryption; e.g. the KY-58 VINSON system. HAVE QUICK is not compatible with SINCGARS, the VHF - FM radios used by ground forces, which operate in a different radio band and use a different frequency hopping method; however some newer radios support both.

Particularities A national Air Force operates generally in a closed common user group. However, deviation to this regulation existed on German territory until 1990. E.g. the HQ-user of the German Air Force in the North of Germany, operational subordinated to 2nd Allied Tactical Air Force used HQ net-group 1, whereas the southern units, subordinated to 4th Allied Tactical Air Force, used HQ net-group 2. The co-ordination of HQ radio frequency channels in the NATO-harmonised UHF-band, the design of the so-called HQ hop-sets, is provided in NATO-Europe in responsibility of the NATO Allied Radio Frequency Agency (ARFA) in Brussels. For training and exercises, HQ operates in peacetime mode with limited frequency access. Four net-numbers may be used overlapping in net-group 1 and 2. However, in tactical operation mode this limitation might be lifted. Some HQ-features are compatible to encryption hardware; e.g. to the KY-58 VINSON-family.

Utilization in the US and NATO HAVE QUICK was well adopted, and by 2007 was used on nearly all U.S. military and NATO aircraft. Improvements included HAVE QUICK II Phase 2. By 2022 the "Second generation Anti-Jam Tactical UHF Radio for NATO" called SATURN had replaced it in all NATO and Allied nations.

See also AN/PRC-152 AN/ARC-164 AN/PRC-117F AN/ARC-182 AN/ARC-210 B band (NATO) Combat-net radio Spread spectrum

References

External links AN/ARC-164 HAVE QUICK II Software Enables Radio Family Ties (Archived) Airscene HAVE QUICK II [1]

Illustrations

Worked examples

Example 1 — a first encounter with Have Quick

Start with the simplest possible case. Write down what Have Quick 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 Have Quick 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 Have Quick 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 Have Quick

In research: Have Quick 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 Have Quick 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: Have Quick is common in secondary-school and first-year university syllabi. It links to neighbouring topics Military electronics of the United States, Military radio systems, Military radio systems of the United States, so understanding it makes those chapters shorter.
In everyday life: Look for Have Quick 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 Have Quick in 20 minutes

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

Frequently asked questions

What is Have Quick in simple terms?

Why does Have Quick 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 Have Quick?

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 Have Quick.