Navigating In Menus; Understanding Gps; 1Overview - Suunto M9_en.p65 Instruction Manual

2.3.2 Navigating in Menus

The menu items can be scrolled with the up and down arrows located on the right side
of Suunto M9. Three menu items are displayed at the same time. The menu item that is
currently active and can thus be selected is displayed in reversed color. The indicator
bar on the left side of the display shows the active mode. To move deeper into the
hierarchy, select a menu item and press Enter . To return one step up in the hierarchy,
press Stop/Cancel . Remember that if you just press Stop/Cancel , the changes made
in the menu are not saved. First you have to accept the changes with the Enter button.
If you want to return directly to the main display of the active mode, press either Enter
(saves the changes) or Stop/Cancel (discards the last change) for more than 2
seconds.
Suunto M9 has been designed to guide you as much as possible when you navigate
in the menus. When you perform a function, Suunto M9 often returns automatically to
the menu item you are likely to use next.
Short pressing Enter in any of the modes brings up the Function menu. The Function
menu is almost identical in all the main modes. In the Function menu you can:
• Turn the GPS on or off manually (GPS On/Off)
• Record and store the coordinates of a Man Over Board situation (MOB)
• View the current position (Position)
• Store a memory point (MEMPoint)
• Store the wind direction (WIND DIR)
For more information on the Function menu, see section 3.8 Function Menu.
The Function menu of the Racing mode differs to a certain extent from other modes.
For more information refer to the Racing mode section 3.7.2 Function menu.

2.4. UNDERSTANDING GPS

2.4.1. Overview
Suunto M9 uses Global Positioning System (GPS) in determining the user's position.
GPS incorporates a set of satellites orbiting the Earth at an altitude of 20 000 km, at the
speed of 4 km/s. The satellites send relatively weak radio signals at power levels
comparable to normal household light bulbs. So, the GPS reception gets disturbed
much more easily than, for example, cellular phone signal reception because the GPS
signals that reach the Earth are thousands of times weaker than cell phone signals.
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