Introduction
The Garmin GPSMAP 79s is a rugged, marine-grade handheld GPS device designed for reliable navigation in various environments, particularly on water. It features a sunlight-readable, high-resolution color display and is built to float and resist water ingress. This manual provides essential information for setting up, operating, maintaining, and troubleshooting your GPSMAP 79s device.
Figure 1: Garmin GPSMAP 79s device with North American map displayed.
Setup
What's in the Box
- Garmin GPSMAP 79s device
- Lanyard
- USB cable
- Documentation (this manual)
Battery Installation
The GPSMAP 79s requires two AA batteries (not included). For optimal performance and battery life, use high-quality alkaline or NiMH rechargeable batteries. Lithium-ion batteries are not recommended due to potential voltage inconsistencies that could damage the device.
- Locate the battery compartment cover on the back of the device.
- Rotate the D-ring counter-clockwise and lift the cover to open.
- Insert two AA batteries, observing the polarity markings (+ and -) inside the compartment.
- Replace the battery cover and rotate the D-ring clockwise to secure it. Ensure the cover is properly sealed to maintain water resistance.
Figure 2: Rear view of the GPSMAP 79s, indicating the battery compartment.
Powering On and Initial Setup
- Press and hold the POWER button until the screen turns on.
- Follow the on-screen prompts to select your language, time zone, and other initial settings.
- Allow the device to acquire satellite signals. This may take a few minutes, especially during the first use or after being off for an extended period. Ensure you are in an open area with a clear view of the sky.
Loading Maps (Optional)
The device comes with a worldwide basemap. For more detailed marine charts or regional maps, you may need to purchase and load them onto the device. The GPSMAP 79s supports microSD cards up to 32 GB for additional map storage. Refer to Garmin's official website for compatible map products and detailed instructions on loading them.
Operating Instructions
Basic Navigation
The GPSMAP 79s uses a button-based interface for all operations. Familiarize yourself with the buttons:
- POWER: Turns the device on/off, adjusts backlight.
- PAGE: Cycles through main pages (Map, Compass, Trip Computer, etc.).
- MENU: Opens the menu for the current page; press twice for the main menu.
- FIND: Accesses search functions for waypoints, tracks, routes.
- MARK: Marks your current location as a waypoint.
- QUIT: Cancels an action or returns to the previous page.
- ENTER: Confirms selections.
- Arrow Keys: Navigate menus, pan maps, adjust zoom.
Figure 3: GPSMAP 79s showing a navigation screen with speed, distance, and estimated time of arrival.
Waypoints, Routes, and Tracks
- Waypoints: Press MARK to save your current location. You can edit waypoint names and symbols. The device can store up to 10,000 waypoints.
- Routes: Create routes by combining multiple waypoints. The device supports up to 250 routes.
- Tracks: The device automatically records your path as a track. You can save tracks and navigate back along them. It can store up to 300 fit activities (tracks).
Satellite Constellations
The GPSMAP 79s supports multiple global navigation satellite systems (GNSS) including GPS, GLONASS, BeiDou, Galileo, QZSS, and SBAS. This multi-constellation support enhances tracking reliability and accuracy worldwide, especially in challenging environments.
Built-in Sensors
- 3-Axis Tilt-Compensated Electronic Compass: Provides accurate heading information even when the device is not held level or when standing still.
- Barometric Altimeter: Tracks changes in pressure to provide precise altitude readings and can be used to plot barometric pressure over time, aiding in weather trend analysis.
Figure 4: GPSMAP 79s showing the electronic compass display.
Figure 5: The GPSMAP 79s floating on water, highlighting its water-resistant and buoyant design.
Maintenance
Cleaning the Device
Regular cleaning helps maintain the device's performance and appearance.
- Wipe the screen and exterior with a soft, lint-free cloth.
- For stubborn dirt, use a cloth dampened with a mild detergent solution, then wipe dry.
- Avoid abrasive cleaners, solvents, or chemical sprays that can damage plastic components and finishes.
- Ensure the USB port cover is securely closed to prevent water and debris ingress.
Battery Care
- Remove batteries if the device will not be used for an extended period to prevent leakage.
- If using rechargeable NiMH batteries, ensure they are fully charged before each trip.
- Dispose of batteries according to local regulations.
Storage
Store the device in a cool, dry place away from direct sunlight and extreme temperatures. Avoid storing it in areas with high humidity.
Troubleshooting
Device Will Not Power On
- Check battery orientation and ensure they are correctly inserted.
- Replace batteries with fresh ones.
- Ensure the battery compartment cover is fully closed and secured.
Poor GPS Signal Acquisition
- Ensure you are in an open area with a clear view of the sky, away from tall buildings or dense foliage.
- Allow sufficient time for the device to acquire satellites, especially after being off for a long time or moved a significant distance.
- Check for any obstructions blocking the device's view of the sky.
Short Battery Life
- Ensure you are using fresh, high-quality AA batteries.
- Reduce backlight brightness.
- Disable unnecessary features if not in use.
- Consider using NiMH rechargeable batteries for repeated use.
Buttons Unresponsive or User Interface Clunky
- Ensure no debris is lodged around the buttons.
- Perform a soft reset by removing and reinserting the batteries.
- Update the device software to the latest version using Garmin Express.
Specifications
| Feature | Detail |
|---|---|
| Brand | Garmin |
| Model Name | GPSMAP 79s |
| Screen Size | 3 Inches |
| Display Type | LED or LCD |
| Resolution | 240 x 400 pixels |
| Connectivity Technology | USB |
| Special Feature | Floats in water, Rugged Design |
| Supported Satellite Systems | GPS, GLONASS, BeiDou, Galileo, QZSS, SBAS |
| Basemap | Worldwide Basemap |
| Waypoints | 10,000 |
| Routes | 250 |
| Tracks/Fit Activities | 300 |
| Memory Storage Capacity | 8 GB (internal) |
| External Memory | MicroSD card slot (up to 32 GB) |
| Battery Type | 2 AA batteries (not included) |
| Battery Life | Up to 19 hours (GPS mode) |
| Dimensions (L x W x H) | 2.67" x 6.85" x 1.67" |
| Weight | 282 Grams |
| Water Rating | IPX6 (unit level only) |
| Built-in Sensors | 3-axis tilt-compensated electronic compass, Barometric altimeter |
Warranty & Support
Product Warranty
The Garmin GPSMAP 79s comes with a 1-year limited warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use. For full terms and conditions, please refer to the warranty documentation included with your device or visit the official Garmin website.
Customer Support
For additional assistance, technical support, or to register your product, please visit the official Garmin support website or contact their customer service. Keeping your device's software updated is recommended for optimal performance and access to the latest features. You can use Garmin Express software for updates.
Official Garmin Website: www.garmin.com
