FLIR RAYMARINE E125 - Page 154

The C-MAP
®
Easy Routing feature is available on
the following cartography:
• C-MAP 4D MAX+
Note: There may be certain areas where sufcient
details are not yet available even on the latest
cartography.
Automatic route generation - user dened
settings
User dened settings must be set before using
automatic route generation. The settings used for
route generation are dependent on cartography
vendor.
User setting
Navionics
®
Autorouting
and
Dock-to-dock
C-MAP
®
Easy Routing
Minimum Safe
Depth
Minimum Safe
Beam
Minimum Safe
Height
Refer to 3.12 Initial set up procedures for details
on setting the required user dened settings.
Differences between automatic route generation
functions
There are important differences between the way
Navionics
®
and C-MAP
®
handle automatic route
generation.
Navionics
®
Autorouting and
Dock-to-dock
C-MAP
®
Easy Routing
Tidal height —
Depth clearance
Autorouting
avoids shallow
areas based on
the user dened
Minimum Safe
Depth setting
plus an additional
Navionics
safety margin.
Autorouting
assumes the
lowest tide level,
normally Lowest
Astronomical Tide
(LAT). The tide can
be lower than LAT
due to atmospheric
effects such as
high air pressure,
wind direction, etc.
Easy Routing
assumes that there
will be some tide.
The user must
apply their own
safety margin as
appropriate to
current conditions.
Route legs that
cross areas
shallower than
the user dened
Minimum Safe
Depth setting
are marked with
hazard waypoint
symbols, it is
critical that these
legs are checked
to ensure that
there is sufcient
tide to avoid the
hazard.
Beam / Height
constraints
Autorouting does
not use the user
dened Minimum
Safe Beam or
Minimum Safe
Height settings to
generate routes.
Objects with beam
/ height constraints
are marked with
hazard waypoint
symbols, it is
critical that these
legs are checked
to ensure that
there is sufcient
clearance to avoid
the hazard.
Easy Routing
uses the user
dened Minimum
Safe Beam and
Minimum Safe
Height settings
to determine
if sufcient
clearance is
available. The
user must apply
their own safety
margin as
appropriate to
current conditions.
The Height datum
must be checked,
as it could be
Mean High Water
Springs (MHWS)
or Highest
Astronomical Tide
(HAT). In both
cases the tide can
be higher than
the datum due
to atmospheric
effects such as
high air pressure,
wind direction, etc.
154