ANCHOR
APPLIES TO:
ALL DOCUMENTED COMMERCIAL FISHING VESSELS OPERATING
BEYOND THE BOUNDARY LINE OR WITH MORE THAN 16 POB ANYWHERE
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REQUIREMENTS:
-Anchor with chain, cable or line.
-Appropriate for the vessel and waters.
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STANDARD:
(THE FOLLOWING IS A GUIDE FOR INFORMATION ONLY AND IS NOT ENFORCEABLE)
TYPICAL POWER BOAT HORIZONTAL LOAD REQUIREMENT FOR AN ANCHOR
(LBS.)
Enter table with length or beam.
Use highest anchor holding requirement.
Size of Boat*
Storm Anchor
Anchor Weights
Holding Power
Standard
Advanced
L.O.A.
Beam
Horz. Load lb.
Steel/Design Steel/Design
10
5
320 lb.
5 lb.
3 lb.
15
6
500 lb.
8 lb.
5 lb.
20
8
720 lb.
11 lb.
7 lb.
25
9
980 lb.
14 lb.
8 lb.
30
11
1400 lb.
18 lb.
10 lb.
35
13
1800 lb.
35 lb.
13 lb.
40
14
2400 lb.
53 lb.
22 lb.
50
16
3200 lb.
82 lb.
28 lb.
60
18
4000 lb.
150 lb.
38 lb.
70
20
4800 lb.
-
41 Ib.
80
22
5600 lb.
-
45 lb.
90
24
6400 lb.
-
53 lb.
100
26
7200 lb.
-
90 lb.
WORKING STRENGTH IN POUNDS OF ANCHORING GEAR
DIAMETER
ROPE
ROPE
CHAIN
SHACKLES
Nominal
3 Strand Twisted
Double Braided
Proof High
Weldless
Inches
Nylon Polyester Polyprop. Nylon Polyester coil Test
Steel
1/4
182
182
113
420
350
1250 2500
1000
5/16
281
281
171
680
560
1875 4000
1500
3/8
407
407
244
960
750
2625 5100
2000
1/2
704
704
420
1630
1400
4500 8200
4000
5/8
1144
1100
700
2800
2400
6800 11500
6500
3/4
1562
1375
1090
3600
3000
9500 16200
9500
7/8
2200
1980
1490
5300
4800
11375
12000
1
2750
2420
1800
6260
5600
13950
15000
1 1/4
4125
3652
2700
1 1/2
5830
5148
3820
2
10120
8800
6700
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INSTRUCTORS NOTES:
-Include extracts from Knights modern seamanship on recommended scope
and anchor types and weights.
-Check overall condition of gear.
-Trawl doors are not considered acceptable anchor devices.
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REFERENCES: 46 CFR 28.235
III - 8
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