en_pev 4_2015 - voyage planning (3) ecdis
DESCRIPTION
EN_PEV 4_2015 - Voyage Planning (3) ECDISTRANSCRIPT
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Voyage Planning Voyage Planning (3)(3)
Use of ECDIS and Electronic Navigation Charrts (ENC) for
voyage planning
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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
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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
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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.
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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.
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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
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Route planning information
• sailing direction, • tidal information,• meteorological
information,
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Information about selected port
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Tidal information for selected port
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Tidal current information for selected area
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Route planning calculations:
- great circle GC,
- rhumbline RL.
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Route Planning from Sydney to Los Angeles: •Great Circle GC - 6490 NM (-273 NM = 18h/15 Knts)
•Rhumb Line RL – 6763 NM
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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
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Route Planning
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45 6
Route Planning by WP Graphic Editor
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Route Plan Table 2
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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,
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Route Plan Table
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Time OUTTime OUT
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Curved track planning: - turning radius
- wheel over points/lines
- safe speed
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It should be possible to carry out route planning
including both straight and curved segments
(IMO Res.A.817(19) 1995).
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Safety values according to size and manoeuvring parameters of
the vessel
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<Enter> <Enter>
Data enter
Selection of depth value for Safety contour
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Setting of safety values: Safety contour 10 m, Safety depth 18 m.
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Setting of safety values: Safety contour 20 m, Safety depth 21 m.
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Planned route
Automatic Checking for navigational safety
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- 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
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Calculation of voyage schedule
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Calculation of voyage schedule
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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
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Modification of the preplanned route.Changing the position of a waypoint.