Gtwin usb driver. Probably one of the most sought-after Breitling models is the Navitimer ref.806. Knows how to use all the information on the dial in combination with the slide rule. Put the original manual online of the vintage Breitling 806 Navitimer APOA.

My Seiko Flight Master First, Determine Your Type of Circular Slide Rule If both the outside and inside circular rules have identical scales with a full range from 10 to 90, then you have what are known as 'C' and 'D' log scales. These are useful for multiplication and division as well as ratios and percentages (which are really just multiplication.) Great, this is the type of slide rule discussed in this tutorial! If the outside rule is the reverse of the inside rule, then you have the 'C' and 'CI' or inverse scales. Sadly, this page will not be helpful to you. But a quick Google search for 'slide rule CI scale' should get you going. Understand Slide Rule Basics The most important thing to remember when using the circular slide rule is to ignore decimal place when entering values.

Always select the two-digit number closest to the two most significant digits in your value. Let's take a look at some examples to make this clear: Number to input Select on the slide rule 5 50 3.4 34 230 23 10,000 10 Of course, you'll have to remember to shift the answer by an appropriate power of ten when you get it back.

Here's an example: 5,000 * 6 will be entered on the slide rule as 50 * 60 and will return 30. You have to figure out the appropriate amount of zeroes to get the correct answer of 30,000. Using the slide rule for a while improves your ability to estimate correct answers! Perform Multiplication Multiplying numbers on the slide rule is easy.

Basically, you set a multiplier on one scale that creates a lookup table on the other scale. Here's how to do it.

(My instructions will refer to the inner and outer rules. Since the C and D scales are identical, you can actually swap them and it'll still work!) Let's do 5 * 6: • Align 10 on the inner rule with 50 on the outer rule. This sets the multiplier to 5. • Now look at 60 on the inner rule. It should line up with 30 on the outer rule. 60 here represents the 6 from our equation.

30 is our answer. • Now we double check the decimal place of our answer. As it happens, 5 * 6 does equal 30, so there's no need to adjust. What's handy is that we have now set up the slide rule to multiply any number by 5 without making any more adjustments. We just need to look at a number on the inner rule and see the answer in the outer rule (for example, 24 is currently aligned with 12 because 5 * 24 = 120.) As you have probably figured out already, you have also set the rule to multiply by 50, 500, 50,000 and 0.005. Remember, it's up to you to keep track of the decimal place. Let's try another one.

3.5 * 4,000: • Align 10 on the inner rule with 35 on the outer rule. • Now look at 40 on the inner rule. It should line up with 14 on the outer rule. • Knowing that our answer should be in the thousands, let's adjust 14 so that it makes sense by shifting it to the left three decimal places: 14,000.

Now it's correct! Try a few others and check your answers with a calculator. You'll quickly get a hang of it. Perform Division Dividing is just the reverse of multiplication. This time we align the two numbers of our problem, and the answer will appear next to the '10'.