# Ed Tech

posted by .

What were the tube computers of 1946-1958 used for?

• Ed Tech -

Look up "tube computers" here:

http://archive.org/web/
and/or
http://www.webopedia.com/

• Ed Tech -

Code breaking was one use but the use I am familiar with is generation of tables solving spherical triangles for navigation by sextant. Using a companion volume " Nautical Almanac" you looked up where a ray from the sun or moon or star intercepted the surface of earth at the time you measured its "altitude" or angle above the horizon. You then estimated where you were. The computed tables told you what angle you should have measured and the direction of the object (azimuth). If you measured one minute of arc less, you were one nautical mile further away along the azimuth line than you thought. By taking sights on two objects or by shooting the sun at two different times with an estimate of how you moved between sights you could fix your position. I used these as late as 1958 between Boston and Bermuda and Halifax and even later in Europe. Airplane navigators also used the tables.

• Ed Tech -

By the way, if you include analog as well as digital computers, I was using tube varieties as late as 1964 for simulation of ship motions and vibration measurement and analysis.

## Similar Questions

1. ### Science

A drop of ink is in a tube.A stopper is used.What will happen to the drop of ink in the tube when you place your hands around the flask for 5 minutes?

3. ### Biology

Tube # 1: 1 ml of water, 3 ml of glucose-1-phosphate and 3 ml of Enzyme. Tube # 2: 1 ml of Ph 7 buffer, 3 ml of glucose-1-phosphate and 3 ml of Enzyme. Both of these reactions tested positive, and the same enzyme was used for both …
4. ### Chemistry

Suppose I put 1 billion bacteria in a 10 ml tube of saline, mix well, and label this tube A. Answer the following questions: 1. Take 1 ml from tube A and put it in an empty tube B. What is the concentration and number of bacteria in …
5. ### Chemistry

Suppose I put 1 billion bacteria in a 10 ml tube of saline, mix well, and label this tube A. Answer the following questions: 1. Take 1 ml from tube A and put it in an empty tube B. What is the concentration and number of bacteria in …
6. ### Math

A cylindrical tube is open at both ends.the internal diameter tube 10.4cm and its length is 25cm. If the thickness of the tube 8mm everywhere,find the total surface of area of the tube.
7. ### Math

7.Figure out the expression bellow (7+3)x2-5 A.8 B.15 C.22 D.30 B 8.When Henry went to the pet store he noticed that there were 12 large fish tanks with goldfish.The store clerk told him that there were 107 goldfish in each tank.How …
8. ### Math

The first modern electronic computer, called ENIAC, was introduced in 1946. Personal home computers were not available until 28 years later. In what year were personal home computers introduced.
9. ### Physics

Compressed air is used to fire a 50g ball vertically upward from a 0.60-m-tall tube. The air exerts an upward force of 3.0N on the ball as long as it is in the tube. How high does the ball go above the top of the tube?
10. ### serial dilutions

label 5 tubes 1-5. Ad 1.50 ml of diluent to each tube. to the first tube, add 500 ul of 1.00 M glucose and mix. transfer 500 ul from the first tube to the second tube and mix. similarly, continue to transfer 500l from each of the remaining …

More Similar Questions