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LNG 1 (Dis.81549.0t) bl. , v22-3D
4.MANOEUVRING CHARACTERISTICS IN SHALLOW WATER
4.1.Turning circle in shallow water (rudder set to 35 deg)
Advance, cbls |
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7 |
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7 min 47 s |
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6 |
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5.8 knots |
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5 |
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4 |
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13 min 59 s |
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5.1 knots |
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26 min 28 s |
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3 |
5.0 knots |
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2 |
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1 |
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20 min 13 s |
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5.0 knots |
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8.5 knots |
0 |
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1 |
2 |
3 |
4 |
5 |
6 |
Transfer, cbls |
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-1 |
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Maximum rudder angle used throughout turn
Water depth to draft ratio 1.2
Tactical diameter: 8.0 cbls
Transfer at 90°: 4.0 cbls
Advance at 90°: 7.1 cbls
Half Ahead
The information contained herein is proprietary to Transas Marine (UK) Ltd and Navis Co. and shall not be duplicated, used, or disclosed in whole or part for any functional other than to evaluate this quotation.
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LNG 1 (Dis.81549.0t) bl. , v22-3D
4.2.Squat
Shallow water
Squat |
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m |
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Bow |
0.6 |
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Stern |
0.5 |
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0.4 |
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0.3 |
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0.2 |
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0.1 |
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0 |
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Speed, knots |
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2 |
4 |
6 |
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10 |
12 |
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Water depth to draft ratio 1.2
The information contained herein is proprietary to Transas Marine (UK) Ltd and Navis Co. and shall not be duplicated, used, or disclosed in whole or part for any functional other than to evaluate this quotation.
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LNG 1 (Dis.81549.0t) bl. , v22-3D
5.MANOEUVRING CHARACTERISTICS IN WIND
5.1.Wind lateral forces and yaw moments (estimated)
Wind |
Force, t |
Moment, |
speed |
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tm |
10 knots |
0.0 |
0.0 |
20 knots |
0.0 |
0.0 |
30 knots |
0.0 |
0.0 |
Wind |
Force, t |
Moment, |
speed |
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tm |
10 knots |
6.4 |
175.4 |
20 knots |
25.5 |
701.6 |
30 knots |
57.4 |
1578.6 |
Wind |
Force, t |
Moment, |
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speed |
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tm |
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10 knots |
8.7 |
-78.8 |
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20 knots |
34.9 |
-315.3 |
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30 knots |
78.5 |
-709.5 |
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Wind |
Force, t |
Moment, |
speed |
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tm |
10 knots |
-6.4 |
-175.4 |
20 knots |
-25.5 |
-701.6 |
30 knots |
-57.4 |
-1578.6 |
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Wind |
Force, t |
Moment, |
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speed |
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tm |
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10 knots |
-8.7 |
78.8 |
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20 knots |
-34.9 |
315.3 |
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30 knots |
-78.5 |
709.5 |
Wind |
Force, t |
Moment, |
speed |
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tm |
10 knots |
6.0 |
-384.3 |
20 knots |
23.8 |
-1537.2 |
30 knots |
53.6 |
-3458.8 |
Wind |
Force, t |
Moment, |
speed |
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tm |
10 knots |
-6.0 |
384.3 |
20 knots |
-23.8 |
1537.2 |
30 knots |
-53.6 |
3458.8 |
Wind |
Force, t |
Moment, |
speed |
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tm |
10 knots |
0.0 |
-0.0 |
20 knots |
0.0 |
-0.0 |
30 knots |
0.0 |
-0.0 |
The information contained herein is proprietary to Transas Marine (UK) Ltd and Navis Co. and shall not be duplicated, used, or disclosed in whole or part for any functional other than to evaluate this quotation.
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LNG 1 (Dis.81549.0t) bl. , v22-3D
5.2.Course keeping limitation at Deep water
Relative wind |
Rudder amount required to maintain course at following wind |
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direction, deg |
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speeds, deg; Full Ahead |
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15 knots |
30 knots |
45 knots |
60 knots |
0 |
0.1 |
0.1 |
0.2 |
0.2 |
45 |
-0.1 |
-1.5 |
-1.6 |
2.2 |
90 |
-1.2 |
-5.1 |
-10.7 |
-18.0 |
135 |
-0.8 |
-6.4 |
-17.4 |
-35.0 |
180 |
0.1 |
0.1 |
0.1 |
0.0 |
225 |
1.0 |
6.7 |
17.7 |
34.0 |
270 |
1.4 |
5.3 |
10.9 |
18.1 |
315 |
0.4 |
1.8 |
1.9 |
-1.8 |
5.3.Drifting under wind influence
Drifting behaviour under wind influence (Stop)
Wind speed, knots |
Direction of drift, deg |
Rate of drift, knots |
10 |
175 |
0.42 |
20 |
174 |
0.85 |
30 |
173 |
1.28 |
40 |
172 |
1.71 |
50 |
172 |
2.14 |
60 |
172 |
2.57 |
Rate of drift (ship speed)
Wind
Direction of drift
Drifting under wind influence
In Table 5.2 steady direction and rate of ship drift under wind influence are presented.
Direction of drift is determined relativity wind direction.
The information contained herein is proprietary to Transas Marine (UK) Ltd and Navis Co. and shall not be duplicated, used, or disclosed in whole or part for any functional other than to evaluate this quotation.
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LNG 1 (Dis.81549.0t) bl. , v22-3D
6. ADDITIONAL INFORMATION
The information contained herein is proprietary to Transas Marine (UK) Ltd and Navis Co. and shall not be duplicated, used, or disclosed in whole or part for any functional other than to evaluate this quotation.
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