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Performance Diagrams - Coggle Diagram
Performance Diagrams
Twin Screw conventional pushing
Higher ship's speed
Lower Transverse Force (pushing)
Higher Longitudinal force
Reduces angles
Higher than 5kt
Waves reduce speed to 3kt
ASD pushing
No speed increasing longitudinal forces
Higher speed
Higher lift forces created by hull
Only Transverse Force
ASD and ATD on line
Single Skeg
Lower centre of pressure
Higher heeling angle
Double Skeg
Higher centre of pressure
Breaking Forces
Higher than 8kt
Transverse Arrest Mode
Not possible
for FAST tugs
Below 8kt
Reverse Arrest Mode (máquinas atrás)