5. Installing the Batteries & Powering on the Oregon 400t

Figure 14: Opening the Battery Cover

Lift the latch on the back of the Oregon to remove the battery cover.

Figure 15: Battery Compartment

The Oregon 400t is powered by two AA batteries.

According to Garmin, Lithium and NiMH rechargeable less than a year old with a capacity greater than 2500 mAh will provide the longest battery life. So be forewarned: high performance batteries = longer battery life; el cheapo batteries = shorter battery life.

Figure 16: microSD Card Slot

The Oregon microSD data card tray is located under the AA batteries.

The Oregon 400t has 4 GB of internal memory, of which about 1.1 GB is free and available to store tracks, waypoints, routes, and additional maps. If you need more storage, for example to install additional maps, you'll need to purchase and install a microSD data card.

Figure 17: Insert the AA Batteries

Insert the AA batteries into the Oregon 400t, making sure to observe the correct polarity.

Figure 18: Replace the Battery Cover

Replace the battery cover and push the latch down to secure the cover.

Figure 19: Power on the Oregon 400t

With the batteries installed, press and hold the power button to power on the Oregon.

Figure 20: Oregon 400t's Main Menu, Page 1

When you turn on the Oregon 400t, the Main Menu appears.

The Main Menu is spread across four pages of icon. Use the left and right arrow keys to scroll from one page to the next. The first screen of icons, shown above, displays the most commonly used items:

• Map - Touching this icon displays your current position on the map
• Where To? - Lets you input a destination location. Destination locations can be recently found items, waypoints, tracks, POIs, cities, tides, or geographic points
• Compass - displays the digital compass screen
• Geocaches - touch this icon to find a Geocache (or view found Geocaches)
• Trip Computer - Displays speed, distance, and time information about your current trip
• Setup - Configure system settings and preferences

Note that the order of the cons displayed on the Main Menu can be customized to your own preferences by tapping Setup -> Main Menu. Items can be moved up or down the list, according to your own preferences.

Figure 21: Oregon 400t's Main Menu, Page 2

The second set of icons on the Main menu (accessed by tapping the right arrow at the bottom of the screen) include the following items by default:

• Mark Waypoint - Waypoints are locations you record and store for later use. Tap this icon to mark a waypoint on the map and store your position in memory
• Elevation Plot - Tap to display a histogram chart of elevation changes over distance or time, or pressure (barometric or ambient) changes over time
• Whereigo - Whereigo is a new outdoor game being supported by Groundspeak. More on this later in the review
• Share Wirelessly - Send or receive information from other Oregon handhelds
• 3D View - View the 3D DEM Digital Elevation Map
• Image Viewer - View images saved on the Oregon

Figure 22: Oregon 400t's Main Menu, Page 3

The third menu screen has the following applications:

• Waypoint Manager - Edit waypoints
• Profile Change - Switch between Recreational, Geocaching, Automotive, Marine, and Fitness modes
• Route Planner - Create and store routes
• Active Route - View your active route
• Track Manager - View, save, or open tracks
• Area Calculation - calculate the size of a specific area

Figure 23: Oregon 400t's Main Menu, Page 4

The fourth Main Menu screen has the following application icons:

• Calendar - Opens the calendar
• Calculator - Opens the calculator
• Sun and Moon - Shows time, sunset time, moonrise time, moonset time, and moon phase for a specific date
• Alarm Clock - Opens the alarm clock
• Hunt and Fish - Opens the hunting and fishing almanac
• Stopwatch - Opens the stopwatch