Man-Overboard Mode; Position Display Mode/Position Correction/Geodetic System Correction; Magnetic Compass Correction - JRC J-NAV 500 Instruction Manual

GPS Navigator J-NAV500

4.12 Man-Overboard Mode

The MOB function (Man-overboard) is useful if something or someone falls overboard. Press
and the navigator shows a graphic display of the position allowing you to steer back to the position
where the event occurred.
The function is available in all display modes.
(1) Press . This action enters the
and the MOB position are connected by a dotted line. (The alarm can
be canceled by pressing
(2) The display shows the bearing, distance and elapsed time (minutes and
seconds) from the MOB position.
You can now steer back to the MOB position using the display information.
• The plot scale is automatically set to 0.5 nm. An arrival alarm sounds when the ship is inside 0.1
nm of the MOB position. (The alarm can be canceled by pressing
(3) The MOB function can be canceled and the previous display mode can be redisplayed by press-
ing for 3 seconds.
Pressing
press
"Entering current position as a waypoint [EVENT]."
4.13 Position Display Mode/Position Correction/Geodetic System
Correction/Magnetic Compass Correction
Make it a rule to check the geodetic system marine chart and this unit setting before
going to sea. If both geodetic systems are wrong, the displayed latitude and longitude
indications will differ from those of the actual position of the ship, which could lead to a
marine accident.
The automatically corrected compass value is an approximate value. For this reason,
manually enter the correct value when you wish to steer the ship on a correct course
according to corrected magnetic compass values.
See Section 4.6, "Basic menu selection operations" for information on setting procedures.
44
.)
does not store the MOB position in memory. To store the MOB position in memory,
and register the MOB position to desired number. (For details, see Section 4.11,
CAUTION
display mode. The ship
.)