UFC 4-150-06
12 December 2001
Table 5-17a Diameter of Berth, in Meters, Using Ship's Anchor and Chaina -
Continued
Overall Vessel
Length, m (ft)
213
244
274
305
335
366
Depth of Water at
MLLW (ft)
-
-
-
-
-
-
3.1
-
-
-
-
-
-
6.1
-
-
-
649
713
590
9.1
933
869
750
809
686
596
12.2
965
846
905
809
722
663
15.2
1001
882
933
818
759
18.3
700
1038
919
978
855
796
21.3
736
992
1079
951
892
764
823
24.4
1093
1006
965
905
837
777
27.4
1106
1033
978
919
796
850
30.5
1120
1047
992
933
864
809
33.5
1134
1061
1001
946
878
823
36.6
3348
1074
1015
887
956
832
39.6
1157
1084
1029
969
901
846
42.7
1170
1038
1097
983
860
914
45.7
1180
1106
1055
992
924
869
48.8
1193
1116
1006
1061
937
882
51.8
1202
1129
1070
1015
946
892
54.9
1138
1212
1079
1024
956
901
57.9
1221
1148
1038
1093
914
965
61
a
For shallower water depths, the swing radii implied by this table are based on the
following
assumptions:
a) Scope = 6 x depth
b) Anchor rode has no sag
c) Allowance for anchor drag = 27.4 m
For depths greater than about 21.3 m, the 6:1 scope is excessive, and swing radii are
based on the computed horizontal length of the anchor chain under heavy load.
Typical ship characteristics and chain sizes have been selected for each ship length
category.
Assumed load conditions are as follows:
a) Wind speed = 50 knots
b) Current = 4 knots, aligned with wind direction
c) Vertical projection of anchor chain = depth + height of hawse hole
d) Vertical angle of chain at anchor = 0 degrees
5-65
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