Garmin VHF 315 Series Installation Instructions Manual Download Page 4

Item

Description

Ç

NMEA 2000 T-connector

È

NMEA 2000 terminator or backbone cable

Connecting the Device to a Remote GPS Antenna

This device must receive GPS information for proper 

functionality. You can connect the device to a NMEA 2000 

network with a GPS antenna, or you can install a remote GPS 

antenna (not included) and connect it to the device.

1

Follow the instructions provided with your external GPS 

antenna to install it on your boat correctly.

2

Route the antenna cable to the back of your device, away 

from sources of electrical interference.

3

Connect the antenna cable to the GPS port on your device.

Connecting to a Hailer Horn or PA Speaker

You can connect the VHF radio to a hailer horn or public 

address (PA) speaker (not included) to use a handset to make 

announcements.

1

If necessary, mount the hailer horn or PA speaker according 

to the installation instructions provided with the device.

NOTE: 

To avoid feedback, you should mount the hailer horn 

or PA speaker at least 3 m (10 ft.) away from, and facing 

away from, a handset.

2

Route or extend the wire from the hailer horn or PA speaker 

to the radio.

3

Connect the white wire on the radio wiring harness to the 

positive (+) wire from the hailer horn or PA speaker.

4

Connect the green wire on the radio wiring harness to the 

negative (-) wire from the hailer horn or PA speaker.

5

Cover the connections with waterproof tape or heat-shrink 

tubing.

NMEA

®

 0183 Device Connections

This diagram illustrates two-way connections for both sending 

and receiving data. You can also use this diagram for one-way 

communication. To receive information from a NMEA 0183 

device, refer to items 

Ê

Ë

Ì

Í

, and 

Î

 when connecting the 

Garmin device. To transmit information to a NMEA 0183 device, 

refer to items 

Ê

Ë

Ì

Ï

, and 

Ð

 when connecting the Garmin 

device.

Item

Description

À

Power source

Á

Power/NMEA 0183 cable

Â

NMEA 0183 device

Item

Garmin Wire 
Function

Garmin Wire 
Color

NMEA 0183 
Device Wire 
Function

Ê

Power

Red

Power

Ë

Power ground

Black

Power ground

Ì

N/A

N/A

Data ground

Í

RxA (+)

Purple

TxA (+)

Î

RxB (-)

Gray

TxB (-)

Ï

TxA (+)

Blue

RxA (+)

Ð

TxB (-)

Brown

RxB (-)

Appendix

VHF 315 Series Specifications

Dimensions (H x W x D) 6 x 20.5 x 18.1 cm (2.36 x 8.07 x 7.13 in.)
Weight

1.527 kg (3.37 lb.)

Temperature range

Operating: From -15° to 70°C (from 5° to 
158°F)
Storage: From -20° to 70°C (from -4° to 
158°F)

Compass-safe distance 50 mm (2 in.)
Water rating*

IEC 605290 IPX7

Antenna connector

S0-239 (50 ohm)

Operating voltage

12.0 Vdc 

Current draw

Standby: 350 mA
Receive: 600 mA
Transmit: From 2.0 A to 6.0 A (from 1 W to 
25 W)

Maximum antenna gain 9 dBi
Antenna port impedance 50 ohm
Hailer output power

20 W at 4 ohm

Hailer horn impedance

4 ohm

NMEA 2000 LEN

1 (50 mA)

*The device withstands incidental exposure to water of up to 1 m 

for up to 30 min. For more information, go to 

www.garmin.com

/waterrating

.

GHS 11 Specifications

Dimensions (H×W×D)

154 × 69 × 40 mm (6.1 × 2.7 × 1.6 in.)

Weight (including 
cable)

0.698 kg (1.54 lb.)

Temperature range

Operating: From -15° to 70°C (from 5° to 
158°F)
Storage: From -20° to 70°C (from -4° to 
158°F)

Compass-safe distance 70 cm (27.5 in.)
Water rating

IEC 60529 IPX7*

Audio output power

MEASUREMENT NEEDED ex. 1 W (with 
4 ohm at 10% distortion)

*The device withstands incidental exposure to water of up to 1 m 

for up to 30 min. For more information, go to 

www.garmin.com

/waterrating

.

Active Speaker Specifications

Dimensions (H×W×D)

111 × 111 × 56.5 mm (6.1 × 2.7 × 1.6 in.)

Weight

349 g (11.22 oz.)

Temperature range

Operating: From -15° to 70°C (from 5° to 
158°F)
Storage: From -20° to 70°C (from -4° to 
158°F)

Compass-safe distance 50 cm (19.6 in.)
Water rating*

IEC 60529 IPX7

Audio output power

2.5 W nominal, 4 W max.

*The device withstands incidental exposure to water of up to 1 m 

for up to 30 min. For more information, go to 

www.garmin.com

/waterrating

.

© 2018 Garmin Ltd. or its subsidiaries
Garmin

®

 and the Garmin logo are trademarks of Garmin Ltd. or its subsidiaries, 

registered in the USA and other countries. GHS

 is a trademark of Garmin Ltd. or its 

subsidiaries. These trademarks may not be used without the express permission of 
Garmin.
NMEA

®

 and NMEA 2000

®

 are registered trademarks of the National Marine Electronics 

Association. Other trademarks and trade names are those of their respective owners.

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