Operation Guide 3258
E-40
Using Bearing Memory
Bearing Memory lets you temporarily store and display a direction reading
so you can use it as a reference as you take subsequent digital compass
readings. The Bearing Memory screen displays the direction angle for the
stored reading, along with an indicator that indicates the stored reading.
When you take digital compass readings while the Bearing Memory
screen is displayed, the direction angle of the current digital compass
reading (as read from the 12 o’clock position of the watch) and the stored
Bearing Memory direction reading will both be shown.
To store a direction angle reading in Bearing Memory
1. Press
C
to start a digital compass measurement operation (page E-34).
•
This will take an initial reading and then take readings every
second for 20 seconds.
•
If a bearing memory direction angle value is already displayed, it
means that there is a reading already stored in Bearing Memory. If
this happens, press
E
to clear the Bearing Memory reading and
exit the bearing memory screen before performing the above step.
2. During the 20 seconds that digital compass readings are being taken, press
E
to store the current
reading in Bearing Memory.
•
The Bearing Memory direction angle fl ashes for about one second as it is stored in Bearing
Memory. After that, the Bearing Memory screen (which shows the bearing memory direction
angle) will appear, and a new 20-second direction reading operation will start.
•
You can press
C
at any time while the Bearing Memory screen is displayed, to start a new
20-second direction reading operation. Doing so will display the direction angle for the direction
that the 12 o’clock position of the watch is pointed. The direction angle of the current reading will
disappear from the display after the 20-second direction reading operation is complete.
12 o’clock position
North pointer
Direction
angle of
current
reading
Bearing Memory
Screen
Bearing memory
direction angle value
Bearing
memory
pointer
12 o’clock position
North pointer
Direction
angle of
current
reading
Bearing Memory
Screen
Bearing memory
direction angle value
Bearing
memory
pointer
E-41
•
During the fi rst 20 seconds after you display the Bearing Memory screen or during a 20-second
direction reading operation you triggered by pressing
C
while the Bearing Memory screen is on
the display, the direction stored in memory is indicated by a Bearing Memory pointer.
•
Pressing
E
while the Bearing Memory screen is displayed will clear the reading currently in
Bearing Memory and start a new 20-second direction reading operation.
Using the Digital Compass While Mountain Climbing or Hiking
This section provides three practical applications for using the watch’s built-in digital compass.
•
Setting a map and fi nding your current location
Having an idea of your current location is important when mountain climbing or hiking. To do this, you
need to “set the map”, which means to align the map so the directions indicated on it are aligned with
the actual directions of your location. Basically what you are doing is aligning north on the map with
north as indicated by the watch.
•
Finding the bearing to an objective
•
Determining the direction angle to an objective on a map and heading in that direction
E-42
To set a map and fi nd your current location
1. With the watch on your wrist, position it so the face is horizontal.
2. While in the Timekeeping Mode or in any of the sensor modes, press
C
to take a compass reading.
•
The reading will appear on the display after about two seconds.
3. Rotate the map without moving the watch so the northerly direction
indicated on the map matches north as indicated by the watch.
•
If the watch is confi gured to indicate magnetic north, align the
map’s magnetic north with the watch indication. If the watch has
been confi gured with a declination to correct to true north, align
the map’s true north with the watch indication. For details, see
“Calibrating the Bearing Sensor” (page E-36).
•
This will position the map in accordance with your current location.
4. Determine your location as you check the geographic contours around
you.
N
N
North indicated
on the map
North indicated by
north pointer
N
N
North indicated
on the map
North indicated by
north pointer
E-43
To fi nd the bearing to an objective
1. Set the map so its northerly indication is aligned with north as indicated
by the watch, and determine your current location.
•
See “To set a map and fi nd your current location” on page E-42 for
information about how to perform the above step.
2. Set the map so the direction you want to travel on the map is pointed
straight in front of you.
3. With the watch on your wrist, position it so the face is horizontal.
4. While in the Timekeeping Mode or in any of the sensor modes, press
C
to take a compass reading.
•
The reading will appear on the display after about two seconds.
5. Still holding the map in front of you, turn your body until north as
indicated by the watch and the northerly direction on the map are
aligned.
•
This will position the map in accordance with your current location,
so the bearing to your objective is straight ahead of you.
N
N
Objective
Current
location
12 o’clock
position
N
N
Objective
Current
location
12 o’clock
position
E-44
To determine the direction angle to an objective on a map and head in that direction (Bearing Memory)
1. Set the map so its northerly indication is aligned with north as indicated
by the watch, and determine your current location.
•
See “To set a map and fi nd your current location” on page E-42 for
information about how to perform the above step.
2. As shown in the illustration to the left, change your position so you (and
the 12 o’clock position of the watch) are pointed in the direction of
objective, while keeping the northerly direction indicated on the map
aligned with north as indicated by the watch.
•
If you fi nd it diffi cult to perform the above step while keeping
everything aligned, fi rst move into the correct position (12 o’clock
position of the watch pointed at the objective) without worrying
about the orientation of the map. Next, perform step 1 again to set
the map.
N
N
Objective
Current
location
12 o’clock
position
N
N
Objective
Current
location
12 o’clock
position
E-45
3. While in the Timekeeping Mode or in any of the sensor modes, press
C
to take a compass reading.
4. While direction angle readings are in progress, press
E
to record the
currently displayed direction in Bearing Memory.
•
The direction angle value and pointer stored in Bearing Memory
will remain on the display for about 20 seconds.
•
To re-display the Bearing Memory direction angle value and
Bearing Memory pointer, press
C
.
•
See “Using Bearing Memory” (page E-40) for more information.
5. Now you can advance while monitoring the Bearing Memory pointer to
ensure that it remains in the 12 o’clock position.
•
Pressing
E
while the Bearing Memory direction angle value and
Bearing Memory pointer are on the display will clear the Bearing
Memory data you saved in step 3 and save the current direction
reading in Bearing Memory.
Note
•
When mountain climbing or hiking, conditions or geographic
contours may make it impossible for you to advance in a straight
line. If this happens, return to step 1 and save a new direction to
the objective.
12 o’clock position
Bearing memory
pointer
North
pointer
Direction angle of
current reading
Bearing memory
direction angle value
12 o’clock position
Bearing memory
pointer
North
pointer
Direction angle of
current reading
Bearing memory
direction angle value
E-46
Digital Compass Precautions
This watch features a built-in magnetic bearing sensor that detects terrestrial magnetism. This means that
north indicated by this watch is magnetic north, which is somewhat different from true polar north. The
magnetic north pole is located in northern Canada, while the magnetic south pole is in southern Australia.
Note that the difference between magnetic north and true north as measured with all magnetic compasses
tends to be greater as one gets closer to either of the magnetic poles. You should also remember that
some maps indicate true north (instead of magnetic north), and so you should make allowances when
using such maps with this watch.
Location
•
Taking a direction reading when you are near a source of strong magnetism can cause large errors in
readings. Because of this, you should avoid taking direction readings while in the vicinity of the
following types of objects: permanent magnets (magnetic necklaces, etc.), concentrations of metal
(metal doors, lockers, etc.), high tension wires, aerial wires, household appliances (TVs, personal
computers, washing machines, freezers, etc.).
•
Accurate direction readings are impossible while in a train, boat, air plane, etc.
•
Accurate readings are also impossible indoors, especially inside ferroconcrete structures. This is
because the metal framework of such structures picks up magnetism from appliances, etc.
Storage
•
The precision of the bearing sensor may deteriorate if the watch becomes magnetized. Because of
this, you should store the watch away from magnets or any other sources of strong magnetism,
including: permanent magnets (magnetic necklaces, etc.) and household appliances (TVs, personal
computers, washing machines, freezers, etc.).
•
Whenever you suspect that the watch may have become magnetized, perform the procedure under “To
perform bidirectional calibration” (page E-37).
E-47
Taking Barometric Pressure and Temperature Readings
This watch uses a pressure sensor to measure air pressure (barometric pressure) and a temperature
sensor to measure temperature.
To enter and exit the Barometer/Thermometer Mode
1. While in the Timekeeping Mode or in any of the sensor modes, press
B
to enter the Barometer/Thermometer Mode.
•
BARO
will appear on the display, indicating that barometric
pressure and temperature measurements are in progress. The
measurement results will appear on the display after about fi ve
seconds.
•
After you press
B
, the watch will take readings every fi ve seconds
for the fi rst three minutes, and then every two minutes after that.
2. Press
D
to return to the Timekeeping Mode.
•
The watch will return to the Timekeeping Mode automatically if you
do not perform any operation for about 24 hours after entering the
Barometer/Thermometer Mode.
To take barometric pressure and temperature readings
While in the Timekeeping Mode or in any of the sensor modes, press
B
.
•
This starts barometric pressure and temperature measurements automatically.
•
You also can perform a barometric pressure and temperature measurement at any time by pressing
B
in the Barometer/Thermometer Mode.
•
The barometric pressure change indicator is displayed if there has been signifi cant change in
barometric pressure. For more information, see “Barometric Pressure Change Indicator” (page E-51).
•
It can take up to four or fi ve seconds for the barometric pressure reading to appear after you enter the
Barometer/Thermometer Mode.
Barometric
pressure graph
Barometric
pressure
change
indicator
Barometric
pressure
Pressure
differential
pointer
Temperature
Barometric
pressure graph
Barometric
pressure
change
indicator
Barometric
pressure
Pressure
differential
pointer
Temperature
