Vessels’ inward/outward clearance procedures Rik Verhaegen
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Vessels’ inward/outward clearance procedures
Rik Verhaegen
1. Geographical location
2. Swot: just the facts
3. Tides
4. Practice
5. Q&A
1.1 The Region
1.2 The River
1.2 The River Boei A1 Zandvlietsluis Westerschelde Scheur-Wielingen
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 95 100 105 110 120 125 130 135
1.3 The Port
2. Swot Analysis: one major fact...
(*) See next slides...
Strenght Weakness (*)
Location:Inland Stevedoring
...
Location:● Challenge!● Draught restriction locks
Inbound: 155.6 dm Outbound: 145 dm
...
Opportunities Threat
... ...
Each location along the river Scheldt is subject to a different tidal range
3.1 Tides: tidal wave
The bottom of the Western Scheldt consists of shallow bars and deeps
3.2 Tides: ...& the riverbed
Further inland, wavehight and swell become less significant. Therefore, the percentage of UKC is reduced in the direction of Antwerp
3.3 Tides: Under Keel Clearance
✔ During a rising tide, the tidal wave rolls into the Western Scheldt.
✔ Adjusting the speed of the vessel in line with the wave's, provides for sufficient UKC
3.4 Tides: inbound navigation
✔ Await sufficient UKC to safely cross the first bar
✔ Navigate in order to cross the last bar with sufficient UKC
✔ These two respective times provide a tidal window
3.5 Tides: outbound navigation
The deeper the vessel's draught, the less time to transit
3.5 Tides: Tidal Window
3.6 Tides: Tackling the challenge
Remark: maximum draughts at average tide
Tide independent
Inbound LOA < 360 m
LOA > 360 m
Outbound LOA < 340 m
LOA > 340 m 145 dm
131 dm
152 dm 145 dm
145 dm
145 dm
100% inbound and outbound 100% inbound, 80% outbound
145 dm
BEHINDBEFORE
160 dm 155.6 dm
131 dm
LocksLocks
3.7 Tides: Tidal windows Jan 25, 2011
Inbound draught (dm)
21:01 6:42 9:58 19:19
1:42 5:07 14:22 17:41 1:29 3:27 14:02 16:00
Outbound draught (dm)
2:30 12:11 15:26 0:48
2:49 3:56
131
4:11
149 145
no tidal window
5:19
Deurganckdock Locks
Deurganckdock Locks
Deurganckdock Locks
Deurganckdock Locks
131
131131
155 155
no tidal window
Remarks: * All tidal windows are accessible via http://www.vts-scheldt.net/
* Spring tide January 23, 2011
h:min m LAT h:min m LAT
7:36 5.69 2:04 -0.06
20:04 5.64 14:43 -0.42
High water Low water
4.1 Practice: introduction
• In general, every vessel shall only sail up- or downriver after being granted permission by the Port Authority
• In case of the conditions described in the following slides, a special permission has to bee granted by the “Joint Nautical Administration” ('JNA'):
– Treaty Middelburg 21st of December 2005
– nautical co-operation between the Netherlands and Flanders started in 1839 (Separation Treaty).
– Flanders and the Netherlands co-operate in the Scheldt region to organize smooth and safe shipping traffic to and from Ports around the River Scheldt.
– Identical compulsory regulations for all sea-going vessels lead to clarity for the users of the waterways
4.2 Practice: Antwerp coordination centre
APA + Pilot services
Senior traffic controller + Chief pilot
All traffic to and from Antwerp Traffic on the river Number of pilots
Tidal window
Traffic controller
Traffic trough that lock
Position of ships in the lock
Barges
4.2 Practice: Antwerp coordination centre Vessel Traffic Service
Loodskotter Noord
Loodskotter West Kreekraksluizen
Oostende
Vlissingen
Terneuzen
Hansweert
Gent
Zandvlietsluis en
Berendrechtsluis
SRK
ACC
Bath
Kallosluis
Royerssluis
Boudewijnsluis en
Van Cauwelaertsluis
4.2 Practice: Pilot services
Oostende
Vlissingen
Terneuzen
Gent
Zeebrugge 1
Ships arrival is notified to APA by agent. Sea pilot mandatory loa >80m Boards by sea Flemish state or Dutch private company. Pilot exemption possible.
4.2 Practice: Pilot services
Oostende
Vlissingen
Terneuzen
Gent
Zeebrugge
2
Flushing roads: sea pilot is replaced by river pilot. Mandatory loa >80m Boards by sea Flemish state or Dutch private company Pilot exemption possible.
4.2 Practice: Pilot services
Oostende
Vlissingen
Terneuzen
Gent
Zeebrugge 3
ACC (APA)
Decision of Senior traffic controller.
River pilot docks in the lock or at outer berths (container terminal)
4.2 Practice: conditions requiring JNA approval
• Sailing up or down with LOA > 300 m and/or draught > 120 dm
exception: Left Bank (Kallo Lock) -> draught > 100 dm
• Distinction between bulk (dry, liquid) and containervessels
• For the latter, 3 classes are defined:
– Between LOA 300 m and 340 m
– Between LOA 340 m and 360 m
– > 360 m and/or breadth > 51 m:
➢ 2000 m visibility on the river – 1000 m visibility at sea
➢ no permission shall be granted if windstrength > 7Bft. at Sea or > 5 Bft. at the Locks
4.2.1 General
• Inbound
– Locks
– Maximum draught: 155.6 dm
– Minimum 60 min tidal window
• Outbound
– Locks
– Maximum draught: 140 dm
– Minimum 60 min tidal window
Remark: if LOA > 300 m: per 4 m >LOA 300m => max. Draught -1 m
4.2 Practice: conditions requiring JNA approval
4.2.2 Bulk
• LOA 300 m – 340 m
– Locks
– Inbound: 155.6 dm, tidal window > 60 min
– Outbound: max. draught 145 dm
● LOA 340 m – 360 m
– Locks
– Inbound: 155.6 dm, tidal window > 60 min
– Outbound: max. draught 145 dm
● LOA > 360 m and/or BOA > 51 m => Ad Hoc advice:
●Ship's file shall be sent to JNA at least 8 weeks prior to the first call
●JNA will provide advice on conditions & terms
4.2.3 Containervessels
4.2 Practice: conditions requiring JNA approval
Remark: Outbound from locks minimum 1 m UKC
4.2 Practice: Case Study Inbound MSC Savona
• Dimensions & capacity
LOA: 365.82m
BOA: 51.20m
14,000 TEU
• Calling at Antwerp on
May 14, 2011 with a
record draught of
15.5m...behind the locks
• ( Slide 14: 16.0m before
the locks )
-15.2m
TAW
Dock River
-12.9m
LAT
-12.5m
TAW
-14.5m
LAT
TAW
LAT
-13,58m
TAW
LAT
Lock
TAW TAW
Tide
Docklevel
+4.2m TAW
Docklevel
+4.2m TAW
17.78m 16.70m
...first something about chart datums!
4.2 Practice: Case Study Inbound MSC Savona
LAT
-11.8m
LAT
Chart datum + Tide m
• -12.5m TAW depth
behind locks
• Local fairway
dredging
4.2 Practice: Case Study Inbound MSC Savona
Dock River
17.78m
19.18m
1 m UKC: Min
requirement
Lock
Entry: May 14, 2011 14:27
15.5m
15.5m 15.5m
16.70m
4.2 Practice: Case Study Inbound MSC Savona
♠
3.68m
UKC
2.28m
UKC
1.20m
UKC
4.2 Practice: Case Study Outbound MSC Danit
• Dimensions & capacity:
LOA: 365.50m
BOA: 51.20m
14,000 TEU
• Sailed from Antwerp's right bank
docks on April 12, 2011 with a record
draught of 14.5m
• ( Slide 13: 15.2 m before the locks )
• Why restricted outbound draught: see
slides 8 and 12...
Dock River
17.78m
17.35m
Lock
Exit: April 4, 2011 20:25
14.5m 14.5m 14.5m
16.70m
4.2 Practice: Case Study Outbound MSC Danit
♠
1 m UKC: Min
requirement 2.85m
UKC
3.28m
UKC
2.20m
UKC
Thank your for your attention!
Questions?
Annex: Berendrechtlock 500m x 68m
1 m bottom clearance
Bottom
= -12.9 LAT
LAT = 0
LW Scheldt
HW
Scheldt
Dockwaterlevel
= + 3.49 m
sill
– Length width Depth LAT Correction
Zandvliet: 500 m 57 m - 13.58 m* - 0.69 m
Berendrecht 500 68 - 13.58 * - 0.69 m
Boudewijn 360 45 - 10.33 * - 0.72 m
Van Cauwelaert 270 35 - 9.83 * - 0.72 m
Royers 180 22 - 6.33 * - 0.77 m
Kallo 360 50 - 12.50 ** - 0.72 m
Annex: Locks
* + 4.20m (Right Bank)
**+ 3.50m (Left Bank)
values based on local reference plane TAW
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