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Capabilities and Limitations - Stern Tug Towing on Line - Coggle Diagram
Capabilities and Limitations - Stern Tug Towing on Line
Depends entirely
Type of tug
Ship's speed
Tractor
Stern to ship's stern
Low speed can give assistance
Direct method
When leading ahead
less effective than conventional
Can easily
change sides
even at higher speeds (7kt)
Higher speed
can use Indirect method
ASD
Less effective than Tractor
in Indirect
Conventional
Only assistance
in One side
Can't switch sides
Can increase ship's speed (position 1)
To switch from 1 to 2
needs gob rope
but still dangerous
Speed< 3kt
Ship's propeller
complicated for tugs
Tug master shall be informed
about engine's intention
