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Table of Contents
Related Manuals for National Geographic NG770C
Summary of Contents for National Geographic NG770C
- Page 1 WATCH COLLECTION NG770C / NG770D / NG771D INSTRUCTION MANUAL...
- Page 3 Dear Customer, By purchasing this radio-controlled wristwatch, you have become the owner of a timepiece equipped with the very latest technology. It is operated simply with a corrector and a push button. The additional "manual start" function allows you to change the battery even when you are outside the transmitter range.
- Page 4 Speed index Push button Corrector Inner scale Outer scale Minute hand Hour hand Date Seconds reception indicator GENERAL INFORMATION In addition to the hour and minute hands, your watch displays the seconds digitally on the left-hand side of the LCD. Steady display of the radio tower symbol indicates that your watch is showing the exact radio-controlled time.
- Page 5 TIME ZONE SELECTION Press the corrector (left-hand recessed button) briefly with a pointed object. The number on the LCD now shows the hour. Each subsequent brief press on the corrector increases the hour by one, i.e., one time zone farther east. At the same time, the hands also move forward by one hour.
- Page 6 TRANSMITTER CALL Press the push button (on the right) for longer than three seconds. The seconds display jumps to "00." The hands move at high speed to the 12:00 position and remain there. If they do not reach this precise position, first follow the instructions under "Positioning the hands."...
- Page 7 NEW START AFTER BATTERY CHANGE The LCD shows "Po 0." You must first move the hands to the exact 12:00 position with the corrector (left-hand side) and finish with the push button (right-hand side), as described in the section "Positioning the Hands."...
- Page 8 AUTOMATIC FUNCTIONS OF YOUR WATCH Synchronization accurate to the second During the night, your watch’s receiver is switched on at 2:00, 3:00, and if required at 4:00, 5:00, and 6:00 a.m. and the internal time memory is synchronized by radio signal accurately to the second. At these switch- on times the radio tower symbol flashes.
- Page 9 GENERAL INFORMATION • Servicing, such as repairs to the crystal, seal, or wrist strap, should only be carried out by a specialist watch retailer. • Seals and crystal should be inspected by an expert at regular intervals, approximately every two years. •...
- Page 10 TECHNICAL DATA Reception frequency 77.5kHz, amplitude modulated, DCF coding Transmitter range (receiver sensitivity) 1,500 km radius of Frankfurt am Main Quartz time base 32 kHz Battery type Li CR 1620 (3 V / 75 mAh) Operating voltage range 2.4 V to 3.4 V Battery life (normal use) 4 years Time zone adjustment range...
- Page 11 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 12 (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 13 (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 14 (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 15 (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 16 (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.
- Page 18 © 2008 National Geographic Society. NATIONAL GEOGRAPHIC and Yellow Border Design are trademarks of the National Geographic Society. All rights reserved.
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Questions and answers
Are Model of watch NG771D water proof?
Yes, the National Geographic model NG771D watch is water-resistant up to 10 ATM, which is equivalent to 100 meters.
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