What is voyage planning who is
responsible
how do we comply with the rules and how
do we utilize the features and functions
available
enactus the purpose of voyage planning
is to support the bridge team and ensure
that the ship can be navigated safely
between ports from birth to birth a
voyage plan should cover ocean coastal
and pilotage waters and according to St
CW regulations be planned in advance
avoid plan should aim to establish the
most favorable route while maintaining
appropriate margins of safety and safe
passing distances offshore the following
factors are amongst those that should be
taken into account the marine
environment the adequacy and reliability
of charted hydrographic data along the
route the availability and reliability
of navigation aids coastal marks lights
and radar conspicuous targets for
position fixing along the route the type
of cargo can influence route selection
any routine constraints imposed by the
ship for example draft type of cargo etc
if possible avoid areas of dense traffic
take into account weather forecasts
KarenT tied wind swell and visibility
conditions if possible avoid areas with
unsure set or areas where onshore set
can be expected
whenever possible follow traffic
separation schemes and fellowship
reporting procedures
technical systems before departure and
if possible take into account previous
experience of their reliability take
into account your own experience with
the planned route and type of ship there
are four main stages in the planning of
a safe voyage appraisal IE the
collection of information and validation
of all relevant information planning IE
the presentation of the raw data into
information and the strategy to be used
the execution of tracking voyage and
communication control monitoring I
ensuring that the voyage plan is being
followed voyage planning can be done the
traditional way by using up-to-date
paper charts and other relevant nautical
information if an electronic chart
display information system with approved
and up-to-date electronic navigational
charts is available such as system
offers many possibilities for
professional and efficient voyage
planning in the following pages a
description of functions which may be
found on an active system is described a
base display represents the minimum
amount of information permitted in a
chart on the screen a typical base
display shows the following information
coastline indication of subsea dangers
traffic systems
after startup of the active system
normally a so-called standard display is
presented on the screen a standard
display normally includes the following
information coastline indication of
subsea dangers traffic systems chart
boundary age to navigation caution areas
caution notes the navigator decides
which elements are to be included in the
standard display other than the base
display information which is always
included all other information in the
charts database may be displayed on
operator requests where needed
examples of such information our past
track pass track labels spot soundings
depth curves cables land details
place-names object names for example boy
names and numbers seabed text light
ranges scale bar labels
latitude/longitude scale the zoom
function allows the navigator in
different ways to select the appropriate
chart scale for the actual situation the
pound function allows the navigator to
move the current chart on the screen in
such a way that the appropriate chart
segment is shown on the screen most
active systems can operate in two modes
routine monitoring route planning an
active system when powered up will
normally automatically start in route
monitoring mode and display its own
ships position on the chart
the following definitions of a route
plan can be used in connection with a
cactus a route plan is a description of
how voyage is to be carried out the
simplest version of a route plan
consists of waypoints drawn in the chart
straight lines which show the intended
sailing between points connect the
waypoints to each other a waypoint is a
position where the ship's course is to
be changed waypoints can normally be
inserted by pointing to the required
position in the chart or typing in the
actual latitude and longitude from the
keyboard the line connecting to
waypoints is referred to as a leg
enactus every stored route and waypoint
get its own unique identifier
a ship's course change can be described
in detail by specifying the turn radius
the actual circle segment will be drawn
on the chart the off-track limit
specifies a distance on both sides of
the course line the off-track limit is
used to control the ship's deviation
from the plan to track the decision
we're on a given course line the next
Waypoint should be located can under
certain circumstances be decided by a
certain distance to a known mark two
marks observed through a straight line
the term point functions allow the
navigator to use these criteria to
determine these points geometrically in
the chart picture the following
information may be inserted in the route
plan the route name the start time for
root waypoints
for each waypoint the following
information may be inserted the Waypoint
name the position longitude and latitude
the wait time at waypoint the turn
radius the message the turnpoint the
off-track limit the cruise speed the max
speed
based on these data the active system
can automatically calculate the number
of waypoints on the route the estimated
time of arrival the course of each leg
the length of each leg waypoints and
corresponding data can be changed or
removed waypoints can easily be moved on
the chart when a waypoint is moved the
part of the route that is affected is
changed correspondingly this means that
it is easy to see the consequences of
moving a waypoint all routes in an area
are drawn on the chart screen in
addition an overview of all
pre-programmed roots in this area is
displayed in a list the navigator can
select a suitable root for the voyage
from this list specifying the waypoints
can create new route plans in addition
new route plans can be created based on
existing plants create a new route by
making a copy of an existing route and
then modifying it existing route when a
route planning process is completed it
is not only recommended but also good
seamanship to require that the route be
validated this implies that the system
checks that the route with off-track
limits does not cross the safety contour
some active systems on today's market
can import and export electronic chart
and routes to and from integrated
navigation systems press the red square
to install charts the safety contour is
the most important safety feature found
in a nexus system a safety contour is a
line in the chart the defines waters
with safe depth in relation to the
actual ship the active system
continuously checks if the ship within a
specified time may cross the safety
contour and if so gives an alarm the
navigator can choose the depth contour
as the safety control or he can specify
his own safety contour press the red
squares to change the safety contour
when pairing up an activist the system
automatically starts in routine
monitoring mode and displays own ships
position on the chart in this example
the chart is displayed in night colors
with North up this is the standard ship
symbol used on active systems the
direction of the course and speed vector
connected to own ship symbol is the
course and speed made good the length of
the vector is proportional to the speed
of the ship each line segment represents
one minute when the ship is showing true
scale on the chart the concentric
circles are substituted by the contour
of the ship own ship is by default
located in the center of the display the
operator can change this position
additional information may be presented
in a separate window or Windows the
navigator can turn this window on and
off the following information may be
displayed in the window the date and
time the chart scale and original scale
the elements included in standard
display the current route with data for
active waypoint the range and bearing
with positions the chart units of
measurement depths and Heights enc date
and data last update of the original
chart various mode data messages as
default the chart on the screen is
oriented Northup and the ship moves in
the chart the same way as on a North
stabilized trumotion radar display a
scale bar is always shown on the chart
the navigator may find course and
distance from the ship to any point in
the chart or between any two points in
the chart in addition to course and
distance the positions for the points
are presented the navigator may display
all available roots on the screen and
select a suitable root for the voyage
all data about the waypoints are
presented in a waypoint list during
sailing the navigator may introduce
changes to the active route
this is done by moving a waypoint to the
ship's position or creating a new weight
point in the ship's position the
electronic chart is object-oriented this
means that when the navigator select an
object in the chart all available
information in the chart database about
the selected object is displayed the
navigator
a note function can be looked upon as
The Navigators second memory the
navigator can pointed to navigators note
symbol in the chart and get the
information connected to that symbol
displayed on the screen the navigator
may introduce new notes in the chart by
pointing on the required position for
the new note and typing the actual notes
text the active system is required to
receive input from the best position
sensors available at any one time
however when the automatic position
sensors failed to provide input to the
actus manual specification of data as
possible whenever manual input is used
information given by the actus must be
used with great care parameters can be
changed in monitoring mode the grounding
alarm time the ship vector length the
ship bearing line length the past track
to be displayed the past track time
label interval when an off-track limit
is defined for the current route an
alarm will be given to the navigator
whenever the ship's position is outside
this limit if own ships position course
and speed is calculated to lead to a
grounding an alarm will be given at the
time specified for example 6 minutes
prior to the expected grounding on most
active systems tracked targets provided
by an office system can be displayed on
the active screen targets from our / are
shown on the actus display with their
own symbol normally there is a limit to
how many r / derive targets can be
displayed on the actus there are active
systems on the market today
can handle 50 RP targets