Tissot SAILING-TOUCH User Manual - Page 15

SAILING-TOUCH * GLOSSARY > COMPASS Compass In compass mode, your SAILING-TOUCH indicates the True North Pole, factoring in magnetic declination. Compass explanations The vertical lines (meridians) on the Earth converge at the True North Pole (Ng), indicating its direction. The hand of a conventional compass indicates the direction of the Magnetic North Pole (Nm). The angle (α) between these two directions Ng and Nm is known as magnetic declination. The magnetic declination value depends on your location on Earth. Furthermore, the Magnetic North Pole is constantly moving. So the magnetic declination value also depends on the date. If the correct magnetic declination value (for the location and date) is set (see the setting procedure on page 14), the minutes hand of your SAILINGTOUCH will point to True North (Ng). If the magnetic declination is set to 0, your SAILING-TOUCH will point to Magnetic north (Nm). The magnetic declination values and dates are indicated on topographic charts, or can be found using special software available on the Internet. For the whole world: http://www.ngdc.noaa.gov/geomagmodels/Declination.jsp Azimuth In compass mode, the LCD display of your SAILING-TOUCH indicates the azimuth (heading).. Azimuth explanations Heading The azimuth is the horizontal angle Heading between the direction of an object (heading) and True North and is measured in degrees from 0° to 359° (e.g.: East = 90°). In compass mode 12 o'clock represents the heading given by the azimuth relative to True North Azimuth 315o Azimuth 315o (factoring in magnetic declination). You can follow a given azimuth (e.g.: 315°) us- ing your SAILING-TOUCH. Hold it horizontally in front of you and turn on yourself until you can read the given azimuth (here 315°) in the LCD: the direction that you will face at that moment is the direction (azimuth) to follow. Note 1 For a correct indication of North, it is extremely important to hold the watch as level as possible. Note 2 The compass function, like any other compass, should not be used near a metal or magnetic mass. In case of doubt, you can recalibrate your compass. Characteristics of function Accuracy: ± 8° Resolution: 2° ALARM The 2 alarms are associated with time T1. An alarm lasts 30 seconds, without repeating. When the programmed time is reached, you can stop the alarm by pressing one of the push-buttons. Stop alarm or 1 sec. or Activate glass Alarm 1 display SETTING > ALARM Alarm 2 display Alarm rings Stop Alarm 2 sec. or or Alarm 1 or 2 display Activate or deactivate alarm Setting mode : time forward : time backward www.tissot.ch 15/16 Validate setting 147_EN