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You have to calibrate the compass. 1. Press the upper right button (switching to compass mode) 2. Press and hold upper left button. The "CALL" will appear on the display. You are in compass calibrating mode. 3. Rotate the watch horizontally (around his vertical axis) slowly, so to be sure that he point the North at least 2 times. 4. Now press the upper left button again to input the declination (this is the angle between the magnetic and real pole). It is different for the area around the world, that you want to explore. 5. Switch between the positions of the cipher by pressing bottom left. 6. Change the cipher by pressing bottom right. 7. Switch between the active position by pressing bottom left. Now you have to enter East or West declination 8. If you are ready press the upper left. "END" of calibration will appear on the screen
Once you calibrate and set the declination you can use the the compass by pressing upper right button. As the compass is very sensitive It is good idea to calibrate it on a field, far away of metal objects and electromagnetic fields (cables, ect.). You need to calibrate the compass each time you want to use it by different surrounding.
Remember the compass function of your watch need much more energy than the watch itself. Don`t worry to change the battery when dead. The water resistance remains good even after. Very robust and accurate device. I hope that should help.
For Temperature calibration: 1. Pull the crown to most extended position (2 notches) 2. Temp hand moves to a default position 3. Move hand in + or - direction by pressing temp or tide buttons (above and below crown button) 4. When done, push crown to 0 position (I used melting ice water to calibrate and fix to 0 deg C)
For Tide calibration: 1. Pull crown to middle position (1 notch) 2. Move hand in + or - direction by pressing temp or tide buttons (above and below crown button) 3. When done, push crown to 0 position
Above link no longer valid. Here's the current one:
Also, the key was inputting the correct #, in this case 3157 - NOT the
100B - at the following page:
I had almost given up when I looked again at the back of my watch and
found the other number.
Here is the link to the user manual if you need it;
Page 12 gives you contact details for lacrosse support
Hope this helps, please ask again if not and i can hopefully find you another source :)