5. When all the desired cities have been set, press the
B
button again to return to the normal zone setting
display.
* The zone setting adjustment mode (flashing display)
will automatically return to the normal display if left
for more than two minutes with no input.
13. When These Problems Occur...
<The Watch Shows Abnormal Display>
When the battery life is close to expiring, the display
or functions may become abnormal.
When these problems occur, replace the battery as
soon as possible.
In rare cases, a strong impact, etc. may cause the
display or functions to become abnormal (no display,
alarm sounds incessantly, etc). In this case, perform
the All-Reset operation by referring to “14. All-Reset
Operation”.
<Following Battery Replacement>
After the battery has been replaced, perform the All-
Reset operation by referring to “14. All-Reset
Operation”.
14. All-Reset Operation
1. Pull the crown out.
2. Press the three buttons
A
,
B
and
M
simultaneously. (While pressed, there will be no
display.)
3. Release the buttons. (All the display segments will
appear.)
4. Push the crown in. (At this point, a monitor sound is
heard.)
This completes the all-reset
operation. Set each mode
correctly before using the
watch.
15. How to Handle the Calculating Functions
Some are not equipped with this function
depending on the model.
Note the points below when using this function.
• Use the calculating functions of this watch as a
guideline only.
• This scale cannot be used for position of the decimal
point.
A. Navigational calculation
1. Time required
Example Obtain the time required for the flight of
an aircraft at 180 knots for 450 nautical miles.
Answer Align “18” on the outer scale with the
SPEED INDEX (
) on the inner scale. Then, “45”
on the outer scale corresponds to “2:30” on the
inner scale (time scale). Thus, the time required for
the flight is 2 hours and 30 minutes.
2. Knots (air speed)
Example Obtain the knots (air speed) for 240
nautical miles with a flight time of 1 hour and 20
minutes.
Answer Align “24” on the outer scale with “1:20” on
the inner scale (time scale).
Then, SPEED INDEX (
) on the inner scale
corresponds to “18” on the outer scale. Thus, the air
speed for the flight is 180 knots.
3. Flight distance
Example Obtain the air distance when the air
speed is 210 knots and the flight time is 40 minutes.
Answer Align “21” on the outer scale with the
SPEED INDEX (
) on the inner scale.
Then, “40” on the inner scale corresponds to “14”
on the outer scale. Thus, the air distance of the
flight is 140 nautical miles.
4. Rate of fuel consumption
Example Obtain the rate of fuel consumption
(gallons/hour) when the flight time is 30 minutes
and the fuel consumption is 120 gallons.
Answer Align “12” on the outer scale with “30” on
the inner scale. Then, the SPEED INDEX (
) on the
inner scale corresponds to “24” on the outer scale.
Thus, the fuel consumption is 240 gallons per hour.
5. Fuel consumption
Example Obtain the fuel consumption required for
a flight when the fuel consumption is 250 gallons
per hour and the flight time is 6 hours.
Answer Align “25” on the outer scale with the
SPEED INDEX (
) on the inner scale.
Then, “6:00” on the inner scale (time scale)
corresponds to “15” on the outer scale. Thus, the
fuel consumption is 1,500 gallons.
6. Estimated flight time
Example Obtain the estimated flight time when the
fuel consumption is 220 gallons per hour and the
aircraft has 550 gallons of fuel.
Answer Align “22” on the outer scale with the
SPEED INDEX (
) on the inner scale.
Then, “55” on the outer scale corresponds to “2:30”
on the inner scale (Time Scale). Thus, the
estimated flight time is 2 hours and 30 minutes.
