Garmin GPSMAP 276C User Manual

LORAN TD Setup
LORAN C is a radio navigation aid operated and maintained in the
United States by the United States Coast Guard. The name LORAN
is an acronym for “LOng RAnge Navigation.” The LORAN
system covers the entire United States and the United States
Coastal Confluence Zone. From the perspective of a mariner, the
system is used for ocean and coastal navigation. It can be used as a
supplemental system for harbor and harbor approach navigation, and
it is used for inland navigation by recreational vehicles.
LORAN TD Feature
The LORAN TD (Time Delay) feature eases the transition from
using LORAN to using GPS. The GPSMAP unit automatically
converts GPS coordinates to LORAN TDs for those who have a
collection of LORAN fixes for favorite fishing spots and other
waypoints recorded as TDs. You can display your position as a TD
or enter waypoints as TDs. The accuracy to be expected from this
conversion is approximately thirty (30) meters. When the unit is
placed in the LORAN TD format mode, it simulates the operation of
a LORAN receiver. Position coordinates may be displayed as TDs,
and all navigation functions may be used as if the unit was actually
receiving LORAN signals.
Using the LORAN TD Format
When creating new waypoints using LORAN TD coordinates, you
must set the correct LORAN chain number and secondary stations in
the Setup TD field before storing the waypoint. After the waypoint
is stored in unit memory, it will always reference the LORAN chain
number and secondary stations currently selected in the Setup TD
field. If you enter a different LORAN chain number or change
the secondary stations or offsets in the Setup TD field, the active
waypoint information will reflect those changes. Since the GPSMAP
276C does not rely on the LORAN signal for navigation, it can
reference a different GRI chain and/or secondary stations and still
navigate to the location stored in memory.
The LORAN Position Format field is located under the Units tab in
the Main Menu. The LORAN TD Setup window contains the fields
to select the Loran GRI-Chain Number, Primary and Secondary
Stations, and TD Offsets.
110 GPSMAP 276C Owner’s Manual
APPENDIX > LORAN TD SETUP

Garmin GPSMAP 276C Specifications

General

Sport (fitness, running)	No
Marine (chartplotters, sounders)	Yes
Routes quantity	50
Tracks quantity	20
Number of waypoints	3000
Form factor	Fixed
Product color	Gray
I/O ports	NMEA 0183
Antenna type	Detachable
Display resolution	480 x 320 pixels
Headphone outputs	1
Battery life (max)	15 h
Sustainability certificates	RoHS

Weight and Dimensions

Depth	48 mm
Width	145 mm
Height	81 mm
Weight	385 g