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Summary of Contents for National Geographic NG770A
- Page 1 WATCH COLLECTION NG770A / NG771A / NG771C INSTRUCTION MANUAL...
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Page 3: Setting The Time
Speed index Compass Control turning bezel Solar panel Crown Inner scale Hour hand Normal Time setting position position Second hand Calendar Outer scale Minute hand SETTING THE TIME 1) Pull the crown out to the time-setting position (2). 2) Turn the crown to set the hour and minute hands to the desired time. - Page 4 USING SLIDE RULE This rule is good for… Multiplication Division Proportion Square root Time required Fuel consumption Estimated flight time Other flying problems Note: Use the control turning bezel located above the crown to move the outer scale. This scale cannot place a decimal point; therefore, the calculation of this watch should be used as a guide only.
- Page 5 (2) Knots (Air Speed) Example: Obtain the knots (air speed for 240 nautical miles with a flight time of 1 hour and 20 minutes. Operation: Align "24" on the outer scale with "80" on the inner scale (time scale). Then, the SPEED INDEX on the inner scale corresponds to "18"...
- Page 6 (5) Fuel Consumption Example: Obtain the fuel consumption required for a flight when the fuel consumption is 236 gallons an hour and the flight time is 9 hours. Operation: Align "23.6" on the outer scale with the SPEED INDEX on the inner scale. Then, "9:00" on the inner scale (time scale) corresponds to "35"...
- Page 7 (8) 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 25 minutes. Operation: Align "75"...
- Page 8 (10) Conversion Example: Convert 45 statute miles into nautical miles and kilometers. Operation: Align "45" on the inner scale with STAT on the outer scale. Then, NAUT on the outer scale corresponds to "39" nautical miles on the inner scale and "KM" on the outer scale corresponds to "72"...
- Page 9 (13) Proportion Example: 30/10 = 60/x Operation: Align "30" on the outer scale with "10" on the inner scale. Then, "60" on the outer scale corresponds to "20" on the inner scale. At this point the proportion for every value and the inner and outer scales is 30:10.
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Page 10: Technical Data
TECHNICAL DATA Movement Solar quartz 10 ½" Solar cell type Amorphous silicon solar cell Secondary battery type Titanium lithium ion Secondary battery size 9.5 mm x 2.1 mm Working time Approx. 6 months (after fully charged) Charging time Approx. 3 hours (under 100 KLX sunlight) Approx. - Page 12 © 2008 National Geographic Society. NATIONAL GEOGRAPHIC and Yellow Border Design are trademarks of the National Geographic Society. All rights reserved.