Japan Radio Co. jlr-21, Instruction Manual

Page: 80 / 148

5-18
5.3.2 Setting the Heading (HEADING)
Selecting
HEADING from the "5.3 Main Menu" displays the Heading Settings Screen.
From this screen, the bow heading settings can be checked.
1. Press the keys to move the cursor and select an item.
2. Press the key to display the menu for the selected item.
The following submenus are available.
• RESTORATION: After initially checking the measured heading, to input it to a
connected external device, select MANUAL. When the heading
measurement has been completed, an alarm sounds, and heading
data is not output to the external device until the alarm is stopped by
pressing CLR.
If AUTO is selected, when heading measurement has been completed,
heading data is output automatically to the external device.
• BACKUP: If the GPS signal is interrupted for some reason and the equipment
cannot determine the ship’s heading with the fixed position, the
bearing will be reckoned with the aid of internal roll and pitch sensors.
The user can set the time of reckoning from 1 and 3 minutes.
• INTERRUPT NMEA: Sets HDT sentence (or THS sentence) processing when heading
measurement cannot be performed.
In case the ship’s heading cannot the specified BACKUP time, the
following part of $GPHDT (or $GPTHS) shall be either blank or the
last determined ship’s heading, Or the output of sentence can be
halted.
(Applies to output HDT sentence (or THS sentence).)
STOP: Stops the output of HDT sentence.
NULL: Blanks will follow $GPHDT or $GPTHS.
$GPHDT, , ← NULL
($GPTHS, , ← NULL
HEADING Settings Screen
Procedure