UFC 4-150-06
12 December 2001
Table 5-17b Diameter of Berth, in Feet, Using Ship's Anchor and Chaina -
Continued
Overall Vessel
Length, m (ft)
700
800
900
1,000
1,100
1,200
Depth of Water at
MLLW (ft)
-
-
-
-
-
-
10
-
-
-
-
-
-
20
-
-
-
2,130
2,340
1,935
30
3,060
2,850
2,460
2,655
2,250
1,955
40
3,165
2,775
2,970
2,655
2,370
2,175
50
3,285
2,895
3,060
2,685
2,490
60
2,295
3,405
3,015
3,210
2,805
2,610
70
2,415
3,255
3,540
3,120
2,925
2,505
2,700
80
3,585
3,300
3,165
2,970
2,745
2,550
90
3,630
3,390
3,210
3,015
2,610
2,790
100
3,675
3,435
3,255
3,060
2,835
2,655
110
3,720
3,480
3,285
3,105
2,880
2,700
120
3,765
3,525
3,330
2,910
3,135
2,730
130
3,795
3,555
3,375
3,180
2,955
2,775
140
3,840
3,405
3,600
3,225
2,820
3,000
150
3,870
3,630
3,450
3,255
3,030
2,850
160
3,915
3,660
3,300
3,480
3,075
2,895
170
3,945
3,705
3,510
3,330
3,105
2,925
180
3,735
3,975
3,540
3,360
3,135
2,955
190
4,005
3,765
3,405
3,585
3,000
3,165
200
a
For shallower water depths, the swing radii implied by this table are based on the
following
assumptions:
d) Scope = 6 x depth
e) Anchor rode has no sag
f) Allowance for anchor drag = 90 ft
For depths greater than about 70 ft, 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:
e) Wind speed = 50 knots
f) Current = 4 knots, aligned with wind direction
g) Vertical projection of anchor chain = depth + height of hawse hole
h) Vertical angle of chain at anchor = 0 degrees
5-67
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