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Warsash Maritime Centre
mv BRO AXEL
Simulated comparison of manoeuvres
The effect from position of close quarters encounter with fv Nordhinder:
a) Main engine full astern
b) Hard a-starboard and main engine full ahead
a) Vessel ran aground outside the channel at heading 198°at approx 2kts.
Ran a distance of 262 m with engine running full astern until grounding at 2kts.
b) Vessel remained in the deep water, but at southerly limit of the channel.
Ran a distance of 170 m before regaining a track in deep water.
Contents
1 Plot of full astern manoeuvre, 3 sheets
2 Data log full astern, 3 sheets
3 Plot of hard a' starboard manoeuvre 3 sheets
4 Data log hard a' starboard 3 sheets
5 Mathematical model details 4 sheets
(Note: Data logging tables show a + 1kt error in long speed)
P G Starkey
Main Ship Data
Type of Ship: Cargo Vessel
Condition: Loaded
Ship No.:
| Displacement |
m3 |
26893 |
| Length between perpendiculars |
m |
150 |
| Length overall |
m |
159.57 |
| Breadth moulded |
m |
24.9 |
| Draught fore/aft |
m |
9.10/9.10 |
| Wetted surface |
m2 |
5552 |
| Wind area, side |
m2 |
1532 |
| Wind area, front |
m2 |
632 |
| Block coefficient |
|
.791 |
| Trim by the stern, % |
|
0 |
| LCB, % of LBP forw, of LBP/2 |
|
1.61 |
| Radius of inertia, % of LBP |
|
24 |
| Type of Engine |
|
Diesel |
| Number of propellers |
|
1 |
| Type of propellers |
|
Fixed Pitch |
| Direction of rotation |
|
Right Handed |
| Propeller diameter |
m |
6.08 |
| Pitch ratio at 0.7R |
|
.755 |
| Area ratio |
|
.465 |
| Shaft Horse Power (ahead) |
MW |
7.36 |
| Shaft Horse Power (astern) |
MW |
7.36 |
| Number of rudders |
|
1 |
| Type of Rudders |
|
Spade |
| Position |
|
in CL |
| Area of rudder |
m2 |
23.6 |
| 100 x total rudder area/LBP x T |
|
1.73 |
| Turning velocity of rudder |
°/sec |
2.50 |
| Max. rudder angle |
° |
35 |
| Number of bow thrusters |
|
1 |
| Nominal bow-thruster force |
kN |
137 |
| Number of stern thrusters |
|
0 |
| Nominal stern thruster force |
kN |
0 |
|
Ship Type: Cargo Condition Loaded
MANOEUVERING TABLE
| Telegraph |
Throttle |
R.P.M |
Speed in
Deep Water
knots |
Speed in
Shallow Water
knots |
| Full Sea Speed |
100 |
100 |
15.7 |
13.6 |
| Full Ahead |
80 |
82 |
12.8 |
11.3 |
| Half Ahead |
50 |
55 |
8.5 |
7.4 |
| Slow Ahead |
25 |
36 |
5.6 |
4.6 |
| Dead Slow Ahead |
14 |
24 |
3.2 |
3.0 |
|
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Deep Water: 1000m
Shallow Water: 10.9 m (20% of Draught)
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