en_pev 4_2015 - voyage planning (3) ecdis
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EN_PEV 4_2015 - Voyage Planning (3) ECDISTRANSCRIPT
Voyage Planning Voyage Planning (3)(3)
Use of ECDIS and Electronic Navigation Charrts (ENC) for
voyage planning
Methods of a Route Planning
• According to the degree of technological advancement of ECDIS we can separate the following methods of a route planning:
1. Traditional methods (planning on the basis of the traditional paper chart and additional nautical publications)
2. Methods based on ECDIS
Route Planning based on ECDIS manual method:
direct (manual positioning of the way points by use of a marker),
Indirect (positioning of the way points by use of a keyboard),
interactive route planning: This method depends on:
an automatic delimitation of own ship’s safety depth contour,
an automatic outline of ship domain in the display chart,
a manual positioning of the way points
Route planning
• It should be possible to carry out route planning including both straight and curved segments.
• It should be possible to adjust a planned route by, for example:– adding waypoints to a route,
– deleting waypoints from a route,
– changing the position of a waypoint,
– changing the order of the waypoints in the route.
Route planning
• It should be possible to plan an alternative route in addition to the selected route. The selected route should be clearly distinguishable from the other routes.
• An indication is required if the mariner plans a route across an own ship’s safety contour.
• An indication is required if the mariner plans a route across the boundary of a prohibited area or of a geographical area for which special condition exist.
• It should be possible for mariner to specify a limit of deviation from the planned route at which activation of an automatic off-track alarm should occur.
Route Planning functions
The route plan is created by entering waypoints –
graphically rather than alpha-numerically:
1. Graphical route planning (planning by using the
WP graphic editor),
2. The waypoint list (route plan table),
3. RL (Rhumb line) / GC (Great circle) selection
4. Alarm setting for ‘route check’,
5. Route check and route correction
Route planning information
• sailing direction, • tidal information,• meteorological
information,
Information about selected port
Tidal information for selected port
Tidal current information for selected area
Route planning calculations:
- great circle GC,
- rhumbline RL.
Route Planning from Sydney to Los Angeles: •Great Circle GC - 6490 NM (-273 NM = 18h/15 Knts)
•Rhumb Line RL – 6763 NM
Construction of a route:- input of way-points (directly on the ENC
or in table)
- adjustment of a planned route
- recalling the way-points list
- way-points selection
- different methods to obtain courses and distances of track
Route Planning
2
3
45 6
Route Planning by WP Graphic Editor
Route Plan Table 2
3
1
0
Planning notes: - courses and distances, - time labels setting, - safe speed, - route limitations, - courses, distances, - rudder angles, - times to go, ETA, - aids to navigation, - critical waters/points,
Route Plan Table
Time OUTTime OUT
Curved track planning: - turning radius
- wheel over points/lines
- safe speed
It should be possible to carry out route planning
including both straight and curved segments
(IMO Res.A.817(19) 1995).
Safety values according to size and manoeuvring parameters of
the vessel
<Enter> <Enter>
Data enter
Selection of depth value for Safety contour
Setting of safety values: Safety contour 10 m, Safety depth 18 m.
Setting of safety values: Safety contour 20 m, Safety depth 21 m.
Planned route
Automatic Checking for navigational safety
- On the ENC will be marked the point where the safety parameters were briched:
• Error 1 intersection of the TSS lane• Error 2 intersection of 10 meters
safety depth contur• Error 3 route entering in the neutral
sone of the TSS• Error 4 new intersection of 10 meters
safety depth contur • Error 5 route over a depth less than
the 10 meters safety depth
1
23
4
5
Calculation of voyage schedule
Calculation of voyage schedule
It should be possible to adjust a planned route by:
- adding waypoints to a route,
- deleting waypoints from a route,
- changing the position of a waypoint,
- changing the order of the waypoints in the route.
Route editing
Modification of pre-planned route
Modification of the preplanned route.Changing the position of a waypoint.