Specifications

MT-550 23
CONTRAST
Allows adjustment of LCD display contrast for best readability in varying lighting
conditions.
• Press and hold the
CALL
key. Menu topics appear in the display.
• Use the SELECT/ENT knob to position the cursor on the CONTRAST topic.
• Press the SELECT/ENT knob. The CONTRAST adjust screen appears in the
display.
USA INT
CONTRAST
LO HI
Contrast Control
• Use the SELECT/ENT knob or microphone keys 0~7 to change the setting.
• Press the SELECT/ENT knob or press and hold the
CALL
key to store the
setting and exit.
DATA SET
Provides On/Off control for display of Lat/Lon, Date/Time, Speed/Course, and
Manual Lat/Lon. Also, provides for entry of Manual Lat/Lon coordinates.
• Press and hold the
CALL
key. Menu topics appear in the display.
• Use the SELECT/ENT knob to position the cursor on the DATA SET topic.
• Push the SELECT/ENT knob. The Data Set menu selections appear in the
display.
USA INT
LLPOSITION
TIME/DATE
SOG/COG
MANUAL LL
Data Set Selections
• Use the SELECT/ENT knob or
ENT
or
EXIT
to select either LLPOSITION,
TIME/DATE or SOG/COG. MANUAL LL is described separately.
• Push the SELECT/ENT knob. The On/Off option is displayed.
• Use the SELECT/ENT knob or any microphone key to select either On or Off.
• Push the SELECT/ENT knob to store the selection and exit to the previous
menu.
The MANUAL LL data item has 3 options, On/Off/Set. The Set option is used to
manually enter your approximate Lat/Lon position and time of day for distress
messages if your GPS is not connected or not functioning. If Manual Lat/Lon is
turned On, it overrides your GPS Lat/Lon position. Be sure Manual Lat/Lon and
time of day are correctly entered before turning the function On. Time of day is
entered as your local time in either 12 hour or 24 hour format. It is important that
your local time offset from Universal Coordinated Time (UTC) is set correctly. See
the TIME SET topic on the Main Menu.