UFC 4-159-03
3 October 2005
Table 3-8. (continued) Recommended Practical Motion Criteria for Moored
Vessels
(b) Recommended Motion Criteria for Safe Working Conditions1 (after PIANC, 1995)
Vessel
Cargo Handling
Surge Sway Heave Yaw
Pitch
Roll
o
o
(o)
Type
Equipment
(m)
(m)
(m)
()
()
-
-
-
-
0.15
0.15
Fishing
Elevator crane
3
3
3
0.4
1.0
1.0
vessels
Lift-on/off
-
-
-
-
1.0
2.0
10-3000
Suction pump
2
GRT
Freighters&
Ship's gear
1.0
1.2
0.6
1
1
2
coasters
Quarry cranes
1.0
1.2
0.8
2
1
3
<10000
DWT3
Ferries, Roll- Side ramp4
2
1
1
0.6
0.6
0.6
4
1
1
0.8
0.6
0.8
On/ Roll-Off
Dew/storm ramp
4
2
3
0.8
0.6
0.4
(RO/RO)
Linkspan
1
1
-
0.4
0.1
0.1
Rail ramp
General
-
2.0
1.5
1.0
3
2
5
cargo 5000-
10000 DWT
Container
100% efficient
1.0
0.6
0.8
1
1
3
vessels
50% efficient
2.0
1.2
1.2
1.5
2
6
2 2
6 2
1.0 1.0
2
1.0
2.0
Bulk carriers Cranes Elevator/
-
-
-
2
0.5
1.0
bucket-wheel
30000-
3
2.5
5.0
Conveyor belt
150000
DWT
3.05
Oil tankers
Loading arms
3.0
-
-
-
-
Gas tankers
Loading arms
2.0
2.0
-
2
2
2
Notes for Table 3-8(b):
1
Motions refer to peak-to-peak values (except for sway,
which is zero-to-peak)
2
GRT = Gross Registered Tons expressed as internal volume of
ship in units of 100 ft3 (2.83 m3)
3
DWT = Dead Weight Tons, which is the total weight of the
vessel and cargo expressed in long tons (1016 kg) or metric
tons (1000 kg)
4
Ramps equipped with rollers.
5
For exposed locations, loading arms usually allow for 5.0-
meter motion.
28
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