Garmin GPSMAP 78 Series Manual

The Garmin GPSMAP 78 series is a rugged, waterproof handheld GPS navigator designed for outdoor enthusiasts. It features a high-sensitivity GPS receiver with HotFix® satellite prediction, a 2.6-inch color TFT display, a worldwide basemap, support for optional topographic and marine mapping, a built-in electronic compass, barometric altimeter, and wireless sharing capabilities. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

Features at a Glance

Key components: Rugged, waterproof (IPX7) housing, 2.6-inch color TFT display, High-sensitivity GPS receiver with HotFix®, Built-in worldwide basemap, Electronic compass, Barometric altimeter, MicroSD™ card slot, USB port, Wireless ANT+® and Bluetooth® connectivity.

Installation

Unpack and inspect contents. Install batteries and optional accessories.

1. Install Batteries: Open battery compartment on back, insert two AA batteries (alkaline, NiMH, or lithium) observing polarity.
2. Attach Wrist Strap: Thread strap through loop on top of unit for secure handling.
3. Install Optional Mounts: For marine or bike use, attach to compatible Garmin mount.
4. Charge (Optional): If using NiMH batteries, charge via USB connection to computer or power adapter.

WARNING! Use only recommended batteries. Do not mix old and new batteries or different types.

First-Time Setup

Power on device; follow on-screen prompts.

1. Acquire Satellite Signal: Go outdoors with clear view of sky. Unit will automatically acquire satellites.
2. Set Language and Units: Press MENU > Setup > System > Language and Units. Select preferred language and measurement units (Metric, Statute, Nautical).
3. Calibrate Compass: When prompted, hold device level and rotate slowly 360 degrees.
4. Calibrate Altimeter: Enter known elevation or allow automatic calibration over time.
5. Load Maps (Optional): Insert microSD card with purchased maps (e.g., TOPO, BlueChart®).

CAUTION! For accurate compass calibration, stay away from metal objects and strong magnetic fields.

Specifications

• Dimensions: 2.4" x 6.3" x 1.4" (6.1 x 16.0 x 3.6 cm).
• Weight: 7.6 oz (215 g) with batteries.
• Waterproof: IPX7.
• Display: 2.6-inch diagonal, 160 x 240 pixels, color TFT.
• Battery: 2 AA batteries (not included).
• Battery Life: Up to 20 hours (typical use).
• Memory: Internal; accepts microSD card.
• GPS Receiver: High-sensitivity with WAAS/EGNOS support.
• Interface: USB 2.0, ANT+® wireless, Bluetooth® (on select models).
• Operating Temp: -4° to 140°F (-20° to 60°C).

Controls and Settings

Access menus via PAGE and MENU buttons. Front Panel: POWER, PAGE, MENU, ROCKER (up/down/left/right/ENTER), QUIT, ZOOM IN/OUT.

Key Functions: POWER (hold to turn on/off), PAGE (cycles through main pages: Map, Compass, Altimeter, Main Menu), MENU (access context-sensitive options), ROCKER (navigate menus, move map cursor).

Settings Menu: System (Language, Units, Display, Time), Tracks, Routes, Profiles, Sensors (Compass, Altimeter calibration), Marine (NMEA, Tides), Wireless (ANT+®, Bluetooth®). Map Setup: Orientation, Detail, Shading. TracBack®: Retrace your path.

Connecting Devices

USB: For data transfer and charging (NiMH). ANT+®: For wireless sensor and data sharing. microSD: For additional maps.

1. Connect to Computer: Use included USB cable to connect to PC for software updates and loading maps/waypoints.
2. Connect Wireless Sensors: Pair with ANT+® heart rate monitor, speed/cadence sensor, or temperature sensor.
3. Share Wirelessly: Exchange waypoints, routes, tracks, and geocaches with other compatible Garmin devices.
4. Load Maps: Insert microSD card with map data into slot on side of unit.

Tip: Ensure device is powered off before inserting or removing microSD card.

Navigation & Waypoints

Create and navigate to waypoints, follow routes and tracks.

1. Mark Waypoint: Press and hold ENTER at current location. Edit name/symbol if desired.
2. Go To Waypoint: From Map page, move cursor to waypoint or select from Waypoint Manager. Press ENTER > Go To.
3. Create Route: Main Menu > Routes > Create Route. Select points on map or from waypoint list.
4. Follow Track: Record a track while moving. Use TracBack® to navigate back along recorded track.
5. Project Waypoint: Create a waypoint at a bearing and distance from current location.
6. Find Places: Use Find menu to locate cities, points of interest, or geocaches (if loaded).
7. Set Alarms: Configure anchor drag, proximity, or arrival alarms in Marine settings.

WARNING! GPS accuracy can be affected by environmental factors. Always carry a map and compass as backup.

Wireless Features

ANT+® Wireless Sharing: Exchange data with compatible Garmin devices. Bluetooth® (on 78s/sc models): Connect to compatible smartphones for Smart Notifications (call, text, email alerts) and Live Tracking.

Care & Cleaning

Clean with fresh water after saltwater or chlorine exposure. Use a soft, damp cloth. Do not use harsh chemicals or abrasives.

CAUTION! Ensure battery compartment seal is clean and intact for waterproofing. Do not open ports while wet.

Regulatory Information

FCC Compliance: This device complies with part 15 of the FCC Rules. Operation is subject to conditions that it does not cause harmful interference. IC Compliance: Complies with Industry Canada license-exempt RSS standard(s). Contains transmitter module FCC ID: IPH-00373. For support, visit www.garmin.com/support or contact Garmin Product Support.

Troubleshooting

Reset: Hold POWER + PAGE + MENU simultaneously for 10 seconds to perform a soft reset (does not erase user data).

Service: Contact Garmin Product Support or visit www.garmin.com.