Navigation / Буклеты / COASTAL_TANKER
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Coastal tanker (Dis.5325 t) , v27-3D |
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Terms used |
Wheel over position (W/O) |
The point at which the change of course is initiated. |
Advance |
The distance which the ship has moved in the |
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direction of the initial heading. |
Transfer |
The distance which the ship has moved perpendicular |
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to the initial heading. |
Tactical diameter |
Transfer at 180° change of heading. |
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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Coastal tanker (Dis.5325 t) , v27-3D
2.2.Turning circles in deep water
Engine Order 10
Advance, cbls |
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1.4 |
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1.2 |
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0 min 48 s |
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9.0 knots |
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1 |
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1 min 34 s |
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0.8 |
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6.6 knots |
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0.6 |
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3 min 18 s |
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5.2 knots |
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2 min 25 s |
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0.4 |
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5.6 knots |
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0.2 |
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13.6 knots 0 |
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-0.2 |
0.2 |
0.4 |
0.6 |
0.8 |
1 |
Transfer, cbls |
-0.2 |
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Maximum rudder angle used throughout turn
Tactical diameter: 1.3 cbls
Transfer at 90°: 0.5 cbls
Advance at 90°: 1.3 cbls
Environmental conditions during Manoeuvring Trial
Wind direction |
Wind speed |
Sea state |
Depth of water, m |
0.0 |
0.0 |
0.0 |
1000 |
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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Coastal tanker (Dis.5325 t) , v27-3D
2.3.Accelerating turn
Advance, cbls |
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0.6 |
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0.4 |
1 min 52 s |
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3.2 knots |
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0.2 |
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2 min 58 s |
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3.7 knots |
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0 |
0.0 knots |
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-0.2 |
0.2 |
0.4 |
0.6 |
0.8 |
1 |
Transfer, cbls |
5 min 5 s |
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4.1 knots |
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-0.2 |
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4 min 2 s |
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4.0 knots |
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-0.4 |
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-0.6 |
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Maximum rudder angle used throughout turn
Engine Order 8 ordered
Tactical diameter: 0.7 cbls
Transfer at 90°: 0.2 cbls
Advance at 90°: 0.5 cbls
Environmental conditions during Manoeuvring Trial
Wind direction |
Wind speed |
Sea state |
Depth of water, m |
0.0 |
0.0 |
0.0 |
1000 |
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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Coastal tanker (Dis.5325 t) , v27-3D
2.4.Yaw checking test
Zigzag (or Kempf) manoeuvre
The manoeuvre provides a qualitative measure of the effectiveness of the rudder to initiate and check changes of heading.
The manoeuvre is performed in the following manner. With the ship steaming at a uniform speed and on a constant heading a nominal rudder angle, say 20 degrees, is applied as quickly and as smoothly as possible and held constant until the ships heading has changed by 20 degrees (check angle) from the base course. At this point 20 degrees of opposite rudder is applied and held until the ship’s heading has crossed the base course and is 20 degrees in the opposite direction, the rudder is then reversed as before. This procedure is repeated until the ship’s head has passed through the base course 5 times. During the manoeuvre the ship’s heading and rudder angle are recorded continuously.
Zigzag (or Kempf) Manoeuvre: Ship’s Heading and Rudder Angle against Time
Heading, deg
30
Rudder, deg
20
Port
10
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Time, s |
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50 |
100 |
150 |
200 |
250 |
300 |
350 |
10
Stbd
20
30
Rudder angle |
20 |
deg |
Initial speed |
13.6 kts |
Check angle |
20 |
deg |
Engine Order 10 |
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Swing time |
35 |
s |
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Overshoot time |
17 |
s |
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Overshoot angle |
13 |
deg |
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Period |
130 |
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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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Coastal tanker (Dis.5325 t) , v27-3D
Terms used
Zigzag (or Kempf) manoeuvre
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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Coastal tanker (Dis.5325 t) , v27-3D
Pull out manoeuvre
The pull out manoeuvre was developed as a simple test to give a quick indication of a ship’s course stability. The ship is held on steady course and at a steady speed. A rudder angle of approximately 20 degrees is applied and the ship allowed to achieve a steady rate of turn; at this point the rudder is returned to midships. If the ship is stable the rate of turn will decay to zero for turns to both port and starboard. If the ship has a steering bias, then port and starboard turns will decay to the same small rate of turn on whichever hand the bias exists. If the ship is unstable then the rate of turn will reduce to some residual rate of turn.
Rate of turn |
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deg/min |
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60 |
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40 |
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Port |
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20 |
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0 |
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Time, s |
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50 |
100 |
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200 |
250 |
300 |
350 |
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450 |
500 |
550 |
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20 |
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Stbd |
40 |
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60 |
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Initial speed 13.6 kts
Unstable Ship
Engine Order 10
Rudder at zero time returned to CLP
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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Coastal tanker (Dis.5325 t) , v27-3D
2.5.Man-overboard and parallel course manoeuvres
Williamson Turn shown (Engine Order 10)
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cbls |
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2.5 |
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2 min 44 s |
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AutoPilot turned ON |
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2 |
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1.5 |
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1 |
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0 min 31 s |
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61 deg |
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0.5 |
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0 |
cbls -1.5 |
-1 |
-0.5 |
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4 min 58 s |
cbls |
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2.5 |
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2 min 43 s |
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AutoPilot turned ON |
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2 |
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1.5 |
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1 |
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0 min 31 s |
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61 deg |
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0.5 |
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0 |
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0.5 |
1 |
1.5 |
cbls |
4 min 57 s |
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Initial Speed 13.6 knots
Forward reach: |
2.51 cbls |
Forward reach: |
2.50 cbls |
Lateral transfer: |
1.66 cbls |
Lateral transfer: |
1.65 cbls |
Lateral shift: |
0.08 cbls |
Lateral shift: |
0.09 cbls |
Parallel course manoeuvre (Engine Order 10)
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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Coastal tanker (Dis.5325 t) , v27-3D
Advance, cbls |
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1.2 |
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1 |
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Elapsed time 1 min 23 s |
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AutoPilot turned ON |
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0.8 |
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Elapsed time 1 min 43 s |
0.6 |
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0.4 |
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0.2 |
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0 |
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Initial Speed 13.6 knots |
0.2 |
0.4 |
0.6 |
0.8 |
Transfer, cbls |
-0.2 |
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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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Coastal tanker (Dis.5325 t) , v27-3D
Terms used
Williamson Turn shown
Parallel course manoeuvre
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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Coastal tanker (Dis.5325 t) , v27-3D
2.6.Lateral thruster capabilities
2.6.1.Bow thruster
Zero forward speed
Engine Order 0
Thruster’s power 100%
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cbls |
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0.4 |
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0.2 |
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-0.4 |
-0.2 |
0.2 |
0.4 |
0.6 cbls |
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2 min 12 s |
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-0.2 |
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4 min 7 s
5 min-0.451 s
-0.6
-0.8
Effect of forward speed of turning performance (90° turn time)
Speed, knots 
9 |
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7 |
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6 |
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5 |
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3 |
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2 |
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1 |
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Time, min |
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0.5 1 1.5 2 2.5 3 3.5
The information contained herein is proprietary to Transas Marine (UK) Ltd duplicated, used, or disclosed in whole or part for any functional other
and Navis Co. and shall not be than to evaluate this quotation.
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