52:
should ensure sufficient minimum UKC for the type and draft of ships due to arrive in the port. Ships typically calculate their UKC to meet criteria for ports to minimise the risk of maritime incidents. A minimum UKC value is determined, which includes a safety margin.
84:
Computer systems and software can be used to manage and calculate UKC for ships and ports. These include systems that dynamically manage UKC using models, forecasting and calculations.
468:
325:
577:
118:
105:
515:
88:
252:
191:
298:
147:
128:
493:
380:
364:
222:
570:
537:
446:
996:
605:
74:
811:
402:
157:
Changes in water level may cause issues with adequate UKC for ships. For example, recent water level reductions in the
790:
276:
100:
38:
of a ship). More simply, it can be described as how much water is left between the bottom of the ship and the seabed.
1006:
563:
711:
356:
214:
183:
139:
91:(IHO) sets a Standard for UKC Management for software and systems: S-129 Under Keel Clearance Management.
753:
657:
794:
758:
652:
1001:
856:
851:
846:
841:
836:
887:
785:
737:
151:
34:
at sea. It is most commonly described as the height and width of available water below the keel (
949:
103:
require ships and their masters to calculate UKC based on the ship's deepest navigational draft.
647:
586:
360:
258:
248:
218:
187:
610:
77:. More dynamic or advanced calculations include safety margins for manoeuvring effects and
626:
121:
108:
872:
816:
600:
143:
113:
41:
150:
found that indequate UKC contributed towards the grounding of the ro/ro freight ferry
990:
882:
877:
706:
132:
732:
642:
158:
78:
66:
35:
161:
have reduced UKC for ships meaning some ships are not able to transit the canal.
716:
62:
326:"All you ever wanted to know about Under Keel Clearance but were afraid to ask"
970:
935:
897:
23:
262:
960:
930:
678:
131:
state that maintaining adequate UKC is important for safe navigation in the
27:
112:
The regulations require the master to discuss the UKC calculation with the
61:
At a basic level, it is typically calculated in metres using the formula:
975:
925:
920:
915:
910:
424:
299:"Simplified approach to operationalise UKC calculations Conference Paper"
73:= UKC. Ship masters and deck officers can obtain the depth of water from
965:
944:
940:
905:
701:
555:
954:
49:
45:
31:
70:
559:
494:"MAIB: Shallow Water Effects Contributed to Ro/Ro's Grounding"
16:
Term to describe the height and width of water under a keel
381:"Under Keel Clearance Technology Wins International Award"
44:
should ensure there is sufficient minimum UKC for their
247:. Boca Raton : London: CRC Press. p. 484.
896:
865:
829:
804:
778:
771:
746:
725:
694:
687:
671:
635:
619:
593:
516:"Panama Canal water levels cause long-term concern"
469:"Under Keel Clearance Management System Fact Sheet"
245:Marine Navigation and Safety of Sea Transportation
403:"Under Keel Clearance System Upgrade for Bunbury"
178:Gilardoni, Eduardo O.; Presedo, Juan P. (2017).
449:. International Hydrographic Organization (IHO)
238:
236:
234:
571:
205:
203:
8:
427:. International Harbour Masters Association
347:
345:
343:
22:(UKC) is the term and calculations used in
775:
691:
578:
564:
556:
538:"Panama Canal Drought Slows Cargo Traffic"
733:Panama Canal/Universal Measurement System
447:"Dynamic Draft and Under Keel Clearance"
211:ECDIS Safety Settings and UKC Management
488:
486:
353:ECDIS Passage Planning and Watchkeeping
170:
116:as the ship approaches US ports/waters.
89:International Hydrographic Organization
471:. Australian Maritime Safety Authority
7:
320:
318:
316:
277:"What Is Underwater Keel Clearance?"
148:Marine Accident Investigation Branch
129:Australian Maritime Safety Authority
14:
75:Electronic navigational charts
1:
606:Length between perpendiculars
243:Weintrit, Adam (2009-06-02).
180:Navigation in Shallow Waters
791:Twenty-foot equivalent unit
101:Code of Federal Regulations
1023:
738:Thames measurement tonnage
138:Inadequate UKC, caused by
812:Builder's Old Measurement
712:Compensated gross tonnage
658:Load line (Plimsoll Line)
357:Witherby Publishing Group
215:Witherby Publishing Group
184:Witherby Publishing Group
355:. Livingston, Scotland:
213:. Livingston, Scotland:
182:. Livingston, Scotland:
888:Metacentric height (GM)
611:Length at the waterline
30:water is available for
754:Gross register tonnage
142:and squat may lead to
99:For US waters, the US
57:Methods of calculation
847:Standard displacement
795:Intermodal containers
95:Uses and requirements
26:to ensure sufficient
997:Nautical terminology
759:Net register tonnage
663:Under keel clearance
540:. The New York Times
496:. Maritime Executive
383:. Maritime Executive
359:. 2023. p. 25.
328:. Nautical Institute
20:Under keel clearance
857:Normal displacement
842:Loaded displacement
852:Light displacement
786:Deadweight tonnage
405:. Daily Cargo News
152:MS Stena Performer
146:. In 2019, the UK
1007:Ship measurements
984:
983:
945:§ Neopanamax
926:Handymax/Supramax
825:
824:
767:
766:
587:Ship measurements
254:978-0-203-86934-5
193:978-1-85609-667-6
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279:. Marine Insight
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144:ship groundings
117:
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59:
42:Master mariners
17:
12:
11:
5:
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873:Inclining test
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817:Moorsom System
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601:Length overall
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507:
482:
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253:
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186:. p. 67.
169:
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166:
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114:maritime pilot
96:
93:
69:-/+ Height of
58:
55:
15:
13:
10:
9:
6:
4:
3:
2:
1019:
1008:
1005:
1003:
1000:
998:
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994:
992:
977:
974:
972:
971:VLCC and ULCC
969:
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883:Angle of loll
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787:
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745:
739:
736:
734:
731:
730:
728:
724:
718:
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713:
710:
708:
707:Gross tonnage
705:
703:
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697:
693:
690:
686:
680:
677:
676:
674:
670:
664:
661:
659:
656:
654:
651:
649:
648:Moulded depth
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366:9781856098168
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224:9781914993695
220:
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185:
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174:
171:
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160:
155:
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140:shallow water
136:
134:
133:Torres Strait
130:
125:
123:
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115:
110:
107:
102:
94:
92:
90:
85:
82:
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76:
72:
68:
64:
63:Charted Depth
56:
54:
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47:
43:
39:
37:
33:
29:
25:
21:
837:Displacement
662:
542:. Retrieved
532:
520:. Retrieved
510:
498:. Retrieved
473:. Retrieved
463:
451:. Retrieved
441:
429:. Retrieved
419:
407:. Retrieved
397:
385:. Retrieved
375:
352:
330:. Retrieved
303:. Retrieved
293:
281:. Retrieved
271:
244:
210:
179:
173:
159:Panama Canal
156:
137:
126:
98:
86:
83:
60:
40:
19:
18:
957:(Qatar-max)
726:Specialized
717:Net tonnage
119:33 CFR
106:33 CFR
1002:Navigation
991:Categories
936:Malaccamax
165:References
961:Seawaymax
931:Handysize
866:Stability
695:Worldwide
679:Air draft
653:Freeboard
518:. Riviera
263:435419166
28:navigable
24:seafaring
976:Yamalmax
921:Chinamax
916:Capesize
911:Baltimax
772:Capacity
217:. 2017.
966:Suezmax
950:Péniche
941:Panamax
906:Aframax
805:Archaic
779:Current
747:Archaic
702:Tonnage
620:Breadth
544:4 April
522:4 April
500:4 April
475:4 April
453:4 April
431:4 April
409:4 April
387:4 April
332:4 April
305:4 April
301:. PIANC
283:4 April
122:157.450
109:157.450
898:Limits
830:Weight
688:Volume
672:Height
594:Length
363:
261:
251:
221:
190:
955:Q-Max
643:Draft
636:Depth
425:"OMC"
79:squat
67:Draft
50:ports
46:ships
32:ships
943:and
878:List
627:Beam
546:2024
524:2024
502:2024
477:2024
455:2024
433:2024
411:2024
389:2024
361:ISBN
334:2024
307:2024
285:2024
259:OCLC
249:ISBN
219:ISBN
188:ISBN
127:The
87:The
71:Tide
48:and
36:hull
993::
485:^
342:^
315:^
257:.
233:^
202:^
154:.
135:.
81:.
65:−
797:)
793:(
579:e
572:t
565:v
548:.
526:.
504:.
479:.
457:.
435:.
413:.
391:.
369:.
336:.
309:.
287:.
265:.
227:.
196:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.