Garmin GPS 38 Instruction Manual

The Garmin GPS 38 is a rugged, 12-channel handheld GPS receiver designed for outdoor navigation. It features a high-contrast LCD display, waterproof construction (IPX7), built-in worldwide basemap, track log recording, waypoint storage, route planning, and multiple navigation screens. Powered by 4 AA batteries, it provides reliable positioning for marine, automotive, and recreational use. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

Features at a Glance

Key components: 12-channel GPS receiver, LCD display with backlight, Waterproof case, External antenna port, Serial data interface, Power/Data connector.

Installation

Unpack and inspect contents. Install batteries and prepare for first use.

1. Install batteries: Open battery compartment, insert 4 AA batteries observing polarity.
2. Attach wrist strap: Thread through eyelet for secure handling.
3. Connect external antenna (optional): Screw into external antenna port for improved reception.
4. Connect to PC (optional): Use serial cable to Power/Data connector for data transfer.

WARNING! Use only alkaline or NiMH rechargeable batteries. Do not mix old and new batteries.

First-Time Setup

Power on GPS; follow initialization procedure.

1. Acquire satellites: Place unit outdoors with clear sky view, wait for satellite acquisition.
2. Set preferences: Use MENU to set units (metric/statute), time format, and display contrast.
3. Initialize position: If prompted, use automatic initialization or enter approximate location.
4. Calibrate compass (if equipped): Follow on-screen prompts for electronic compass calibration.

CAUTION! Initial satellite acquisition may take several minutes when used for first time or after long storage.

Specifications

• Receiver: 12 parallel channel GPS receiver.
• Update Rate: 1 second continuous.
• Accuracy: Position: 15 meters RMS; Velocity: 0.1 knot RMS.
• Dynamics: Supports speeds up to 999 knots, altitudes to 18,000 meters.
• Interface: NMEA 0183, RTCM 104 DGPS corrections, Garmin proprietary.
• Waypoints: 500 user waypoints with name and symbol.
• Routes: 20 reversible routes with up to 30 waypoints each.
• Track Log: 10 saved tracks, 750 points each.
• Power Source: 4 AA batteries (alkaline or NiMH), 12-35 VDC external.
• Waterproof: IPX7 standard.
• Operating Temp: -15°C to 70°C.

Controls and Settings

Access functions via front panel buttons. Front Panel: POWER, PAGE, ENTER/MARK, GOTO, UP/DOWN arrows.

Display Screens: Satellite Status, Map, Navigation, Highway, Position.

Setup: UNITS (statute/nautical/metric), TIME (12/24 hour), DISPLAY (contrast, backlight timeout). Navigation: GOTO waypoints, follow routes, track back. System: Initialize, system info, battery save mode.

Connecting Devices

External antenna: Screw-type connector. PC connection: Serial cable to Power/Data port. External power: 12-35 VDC input.

1. Turn off GPS before connecting cables.
2. Match connectors (serial cable to Power/Data port).
3. Secure connections; ensure waterproof seal is intact when using external ports.

Tip: Use only Garmin-approved cables to avoid damage to data port.

Navigation Functions

Basic navigation to waypoints and along routes.

1. Mark waypoint: Press ENTER/MARK at location, edit name/symbol if desired.
2. Go to waypoint: Press GOTO, select waypoint from list or map.
3. Follow route: Create route in MENU, activate for turn-by-turn navigation.
4. Track navigation: Use TRACK BACK to retrace path.
5. View position: Position screen shows coordinates, altitude, and accuracy.
6. View map: Map screen shows position, waypoints, and track.
7. View satellite status: Satellite screen shows signal strength and position fix.
8. View navigation data: Navigation screen shows bearing, distance, speed, and ETA.

WARNING! GPS accuracy can be affected by terrain, buildings, and atmospheric conditions. Always carry backup navigation methods.

Advanced Features

DGPS capability: Connect to external beacon receiver for improved accuracy. NMEA output: Interface with autopilots, chartplotters, or other NMEA devices. Data transfer: Upload/download waypoints, routes, and tracks to PC using Garmin software.

Care & Cleaning

Remove batteries if storing for extended periods. Clean with damp cloth and mild detergent; rinse with fresh water after saltwater use.

CAUTION! Do not use harsh chemicals or abrasives. Ensure battery compartment seal is clean and intact for waterproofing.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits. This device complies with Part 15 of the FCC Rules. Copyright © Garmin Ltd. or its subsidiaries. For support, visit www.garmin.com or contact Garmin Product Support.

Troubleshooting

Reset: Remove batteries for 30 seconds to perform soft reset.

Service: Contact Garmin Product Support; www.garmin.com