User manual CITIZEN WATCH CTZ-D6758

[. . . ] Displaying the Time in 30 Cities of the World The Coordinated Universal Time (UTC) and the time in 30 cities of the world can easily be displayed. The name of and time in a city will be displayed at [6] and [7] and change in sequence each time the A (UP) or C (DOWN) button is pressed. Operation: Press the M button to move the mode hand to either [TME] or [CAL]. Press the A and C buttons simultaneously to switch between the analog and digital section. [. . . ] Rate of climb (or descent) The rate of climb (or descent) can be obtained from the time required to reach an altitude. Example: Obtain the rate of climb when an aircraft reaches an altitude of 7, 500 feet after climbing for 16 minutes. Answer: Align "75" on the outer scale with the "16" on the inner scale. Then, "10" on the inner scale corresponds to "47" on the outer scale. Time of climb (or descent) The time required for climb can be obtained from the altitude to be reached and the rate of climb (or descent) Example: Obtain the time of climb when an aircraft is to climb to 6, 300 feet at a rate 550 feet per minute. Answer: Align "55" on the outer scale with "10" on the inner scale. Then, "63" on the outer scale corresponds to "11. 5" on the inner scale. Conversion Example: Convert 30 statue miles into nautical miles and kilometres. Operation: Align "30" on the outer scale with STAT () on the inner scale. Then, NAUT () on the inner scale corresponds to "29" nautical miles on the inner scale, and "12 km"(s) on the inner scale corresponds to "48. 2" km on the outer scale. Multiplication Example: 20 x 15 Answer: Align the "20" on the outer scale with "10" on the inner scale. Then, "15" on the inner scale corresponds to "30" on the outer scale. Take into account the position of the decimal point and add one zero to obtain 300. Note that with the scales of this watch, the position of the decimal point cannot be obtained. Division Example: 250 / 20 Answer: Align "25" on the outer scale with "20" on the inner scale. Then, "10" on the inner scale corresponds to "12. 5" on the outer scale. Proportion Example: 30/20 = 60/x Operation: Align "30" on the outer scale with "20" on the inner scale. Then, "60" on the outer scale corresponds to "40" on the inner scale. At this point, the proportion for every value on the inner and outer scales is 30:20. Square root Example: Square root of 225 Operation: Turn the outer scale slowly and find a value that corresponds to both "22. 5" on the outer scale and "10" on the inner scale. In this example, ``22. 5'' on the outer scale corresponds to "15" on the outer scale. To Keep Your Watch in Good Condition * Exposure to water will diminish the durability of most types of leather bands. [. . . ] When there are sudden temperature changes such as entering a cool building from the hot out of doors, or jumping into pool on a hot day the watch may fog. Conversely, if you go to the cold outdoors from a warm building, fogging may occur. As long as the fogging clears in a short period of time, there is no need for concern. Be sure the crown is completely pushed in prior to any contact with moisture. [. . . ]