Garmin GPSMAP 17 Посібник із швидкого старту - Сторінка 13

First Time Fix

The ﬁrst time you power up your new GPS 17, the

receiver must be given an opportunity to collect satellite data

and establish its present position. To ensure proper initializa-

tion, the GPS 17 is shipped from the factory in AutoLocate

mode, which will allow the receiver to "ﬁnd itself" anywhere

in the world.

Once the GPS17 is installed and powered on, it will

begin to search for satellites.The GPS 17 will output naviga-

tion data once it has calculated an initial position ﬁx. By

default, the following data will be output in NMEA 0183,

Version 2.0 format:

• Latitude/Longitude/Altitude (GPGGA, GPRMC)

• Velocity (GPRMC)

• Date/Time (GPRMC)

• Error Estimates (PGRME)

• Satellite and Receiver Status (GPGSA, GPGSV,

PGRMB, PGRMT)

WAAS Capability

The GPS 17 is capable of receiving WAAS (Wide Area

Augmentation System) satellite signals. WAAS is an FAA

(Federal Aviation Administration) funded project to improve

the overall accuracy and integrity of the GPS signal for avia-

tion use, but land/sea based users may also beneﬁt from this

system. At this time, the system is still in the development

stage and is not fully operational.

There are currently two WAAS satellites that can be

received in the U.S.A., one over the Atlantic Ocean and

one over the Paciﬁc Ocean, in a geo-stationary orbit over the

equator. Effective use of the WAAS satellite signal may be

limited by your geographic location in relation to those satel-

lites, now in developmental service. WAAS satellite signal

reception requires an absolute clear view of the sky and

works best when there are no nearby obstructions such as

buildings, mountains, etc. WAAS satellites will be numbered

33 or higher on the sky view on your NMEA device.

Operation

Using the

GPS 17