BTM Basic Shiphandling
BTM Basic Shiphandling
BTM Basic Shiphandling
5
Stopping and Slow Speed Control
Pivot Point
b) Making Headway
+ P
+
1/4 L
c) Making Sternway
+
+
P
+
+
+
1/4 L
PIVOT POINT
Vessel on even keel
b) Making Headway
Making Sternway
145m 25m
+ +
b) Creeping Ahead
-
-
Thrusting With Headway
a) Straight Line
+
25m 150m
Thrusting With Sternway
a) Pivot Point
125m
b) Turning Moments
P
13T 7T
125m 30m
TURNING LEVERS AND MOMENTS
Vessel Stopped
P
15 Tonne
15 Tonne P Tug
Tug
P
Vessel making sternway
P
The Effect of Wind
Turning Lever
Turning Lever
The Effect of Wind with change of trim
Turning Lever
Reduced Turning
Lever
Cross Channel Ferries
Pride of Le Havre and Pride of Portsmouth
Actual Wind Figures
10 7
15 16
20 28
25 44
30 64
35 87
40 113
45 143
50 177
55 214
60 255
Length 161 metres Draught 6.4 metres Gross tons 33,336
65 301
"Approximate Forces"
2 4 6 8
Transfer - Cables
Twin Anchor Dredge
INERTIA STOP
just stopping engines, maybe a slight turn to port. Very long
distance and time to come to a full stop
HOW NOT TO DO IT !