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

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Route Planning by WP Graphic Editor

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,

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

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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.