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船舶用GPSシステム Garmin GPSMAP 721のPDF オーナーズマニュアルをオンラインで閲覧またはダウンロードできます。Garmin GPSMAP 721 38 ページ。 Important safety and product information
Garmin GPSMAP 721 にも：クイック・スタート・マニュアル (4 ページ), 取付説明書 (8 ページ), 製品情報 (20 ページ)

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Setting the Water Temperature Offset

Before you can set the water temperature offset, you must have

a NMEA 0183 water-temperature sensor or a temperature-

capable transducer to measure water temperature.

The temperature offset compensates for the temperature

reading from a temperature sensor.

Measure the water temperature using the temperature

sensor or temperature-capable transducer that is connected

to the chartplotter.

Measure the water temperature using a different temperature

sensor or a thermometer that is known to be accurate.

Subtract the water temperature measured in step 1 from the

water temperature measured in step 2.

This is the temperature offset. Enter this value in step 5 as a

positive number if the sensor connected to the chartplotter

measures the water temperature as being colder than it

actually is. Enter this value in step 5 as a negative number if

the sensor connected to the chartplotter measures the water

temperature as being warmer than it actually is.

Select Settings > My Vessel > Temperature Offset.

Enter the temperature offset calculated in step 3.

Communications Settings

NOTE: Some settings and options require additional charts or

hardware.

Select Settings > Communications.

Serial Port 1: Sets the input/output format for port 1 to use

when connecting the chartplotter to external NMEA devices,

computers, or other Garmin devices.

Serial Port 2: Sets the input/output format for port 2 to use

when connecting the chartplotter to external NMEA devices,

computers, or other Garmin devices.

NMEA 0183 Setup: Sets the NMEA 0183 sentences the

chartplotter transmits, how many digits to the right of the

decimal point are transmitted in a NMEA output, and how

waypoints are identified

NMEA 2000 Setup: Allows you to view and label the devices on

the NMEA 2000 network

Wireless Devices: Allows you set up wireless devices

(page

24).

NMEA 2000 and NMEA 0183

GPSMAP 500 series and GPSMAP 700 series chartplotters can

accept data from both NMEA 0183 devices and certain NMEA

2000 devices connected to an existing NMEA 2000 network on

your boat.

echoMAP 50 series and echoMAP 70 series chartplotters can

accept data from NMEA 0183 compliant devices.

NMEA 0183

The chartplotters support the NMEA 0183 standard, which is

used to connect various NMEA 0183 devices, such as VHF

radios, NMEA instruments, autopilots, wind sensors, and

heading sensors.

To connect the chartplotter to optional NMEA 0183 devices, see

the chartplotter installation instructions.

The approved NMEA 0183 sentences for the chartplotter are

GPAPB, GPBOD, GPBWC, GPGGA, GPGLL, GPGSA,

GPGSV, GPRMB, GPRMC, GPRTE, GPVTG, GPWPL,

GPXTE, and Garmin proprietary sentences PGRME, PGRMM,

and PGRMZ.

This chartplotter also includes support for the WPL sentence,

DSC, and sonar NMEA 0183 input with support for the DPT

(depth) or DBT, MTW (water temperature), and VHW (water

temperature, speed, and heading) sentences.

(page

24).

(page

24).

NMEA 0183 Settings

Select Settings > Communications > NMEA 0183 Setup.

Route: Enables NMEA 0183 output sentences for routes.

System: Enables NMEA 0183 output sentences for system

information.

Garmin: Enables NMEA 0183 output sentences for Garmin

proprietary sentences.

Sounder: Enables NMEA 0183 output sentences for the

sounder (if applicable).

Posn Precision: Adjusts the number of digits to the right of the

decimal point for transmission of NMEA output.

Waypoint IDs: Sets the device to transmit waypoint names or

numbers via NMEA 0183 while navigating. Using numbers

may resolve compatibility issues with older NMEA 0183

autopilots.

Defaults: Restores the NMEA 0183 settings to the original

factory defaults.

NMEA 2000

GPSMAP 500 and 700 series chartplotters are NMEA 2000

certified and can receive data from a NMEA 2000 network

installed on the boat to show specific information, such as

depth, speed, water temperature, wind speed and direction, and

engine data.

You can also name your engines and tanks so that you can

better identify their location on the boat.

To connect a GPSMAP chartplotter to an existing NMEA 2000

network and to see a list of supported NMEA 2000 PGN

numbers, see the chartplotter installation instructions.

Viewing a List of NMEA 2000 Network Devices

You can view the devices connected to the NMEA 2000

network.

Select Settings > Communications > NMEA 2000 Setup >

Device List.

Communication with Wireless Devices

The chartplotters can create a wireless network to which you

can connect wireless devices. Also, some models can connect

to Bluetooth ® wireless devices using the AVRCP profile.

Connecting a Bluetooth Wireless Device

You can wirelessly connect the chartplotter to a Bluetooth

device.

Place the Bluetooth device within 33 ft. (10 m) of the

chartplotter.

Select Settings > Communications > Wireless Devices >

Bluetooth Devices > Bluetooth.

Follow the on-screen directions.

Disconnecting a Bluetooth Wireless Device

Select Settings > Communications > Wireless Devices >

Bluetooth Devices > Device List.

Select a device.

Select Forget Device.

Setting Up the Wireless Network

The first time you access the Wireless Network settings, you are

prompted to set up the network.

Select Settings > Communications > Wireless Devices >

Wireless Network > On.

Enter a name for this wireless network.

Enter a password.

You will need this password to access the wireless network

from a wireless device.

Device Configuration