earth science

Zera Luther Tanner

Zera Luther Tanner 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 Zera Luther Tanner rather than just read about it. In short: Zera Luther Tanner (December 5, 1835 – December 16, 1906), sometimes spelled Zero, was an American naval officer, inventor, and oceanographer. Tanner invented a depth sounding system, wrote several books on hydrography and retired as a commander of the United States Navy in 1897.

Key takeaways

Zera Luther Tanner belongs to earth science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
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Reproduce the core statement of Zera Luther Tanner from memory before moving on to harder problems.

Reference excerpt

Zera Luther Tanner (December 5, 1835 – December 16, 1906), sometimes spelled Zero, was an American naval officer, inventor, and oceanographer. Tanner invented a depth sounding system, wrote several books on hydrography and retired as a commander of the United States Navy in 1897.

Career

Zera Luther Tanner was born in Warsaw, New York, in 1835, the son of Zerah and Ruth (Foster) Tanner. The elder Tanner died when his son was one year old, so the younger Tanner worked in family farms until his late teens, when he apprenticed to a mechanic. Tanner traveled by ship to Great Britain in 1855, and because of ill health chose to take a longer voyage from Liverpool to Bombay, India aboard SS Culloden in 1856. After two round trips, one as third officer, Tanner chose sailing for his profession. Returning to the United States, after Tanner served aboard American merchantmen, he eventually assisted several seaborne troop movements in the Gulf of Mexico.

Civil War service Tanner chose to join government service and was appointed acting ensign of the Union Navy in the summer of 1862. Tanner served upon the bark USS Midnight and the supply steamer USS Rhode Island during the American Civil War. When Rhode Island captured a British blockade runner in December 1864, Tanner was put in charge of the prize crew. During the Second Battle of Fort Fisher in 1865, Tanner commanded the boats from his vessel landing Union ground forces.

Post war service Tanner entered the United States Navy in 1868, coming over from the deactivated volunteer services. Until his retirement in 1897, Tanner served the navy in hydrographic survey and dredging commands, often in conjunction with the United States Commission of Fish and Fisheries, generally known as the United States Fish Commission. Tanner partially designed and oversaw the construction of two ships for the commission. USFC Fish Hawk, in service from 1880 to 1926 and the first large vessel ever built expressly for the promotion of fisheries, was a smaller vessel designed for coastal waters and was primarily used as a mobile fish hatchery although she also conducted fisheries research, while USFC Albatross, which served as a fisheries research ship from 1882 to 1921 except for brief periods in U.S. Navy service in 1898 and from 1917 to 1919, was the first full-sized vessel primarily designed for marine research. Tanner was the first commanding officer of Fish Hawk, from November 10, 1882, to May 21, 1885. He commanded Albatross for nine years, including transporting famed naturalist Alexander Emanuel Agassiz on an 1891 voyage to the Galapagos Islands. Tanner was promoted to commander in 1893 and was relieved of command of Albatross on May 1, 1894. After an extended furlough, was assigned to duty with the Fish Commission on January 1, 1895. He retired from the Navy on December 5, 1897, having reached the mandatory retirement age of 62.

Death and legacy Tanner died in Washington, D.C. on December 16, 1906, aged 71, and was buried with military honors at Arlington National Cemetery. Tanner was a Companion of the Military Order of the Loyal Legion of the United States. He was also a member of the Grand Army of the Republic.

Legacy Tanner developed an improved method of depth sounding, using instruments of his own design. He patented his system in 1899 as the Tanner navigational sounding apparatus. Two U.S. Navy ships have been named after Tanner. After World War II, USS Pamina (AKA-34), an attack cargo ship with service in the Okinawa campaign was re-purposed for oceanographic survey work and renamed USS Tanner (AGS-15). Tanner spent her career mapping significant coastline areas and was retired in 1969. In 1990, USNS Tanner (T-AGS-40) was built for the U.S. Navy as a fast oceanographic research vessel. Now named TS State of Maine, she serves as the training ship of the Maine Maritime Academy.

Selected works Deep-sea exploration: a general description of the steamer Albatross, her appliances and methods

Date of rank Acting ensign – August 18, 1862 Acting master – September 29, 1864 Ensign – March 12, 1868 Master – December 18, 1868 Lieutenant – March 21, 1870 Lieutenant commander – February 22, 1883 Commander – February 7, 1893 Retired list – December 5, 1897

References

Illustrations

Worked examples

Example 1 — a first encounter with Zera Luther Tanner

Start with the simplest possible case. Write down what Zera Luther Tanner 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 Zera Luther Tanner 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 Zera Luther Tanner 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 Zera Luther Tanner

In research: Zera Luther Tanner 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 Zera Luther Tanner 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: Zera Luther Tanner is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1835 births, 1906 deaths, 19th-century American explorers, so understanding it makes those chapters shorter.
In everyday life: Look for Zera Luther Tanner 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 Zera Luther Tanner in 20 minutes

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

Frequently asked questions

What is Zera Luther Tanner in simple terms?

Why does Zera Luther Tanner 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 Zera Luther Tanner?

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 Zera Luther Tanner.