TUGS

Harbor workhorses

• Actions on heartstrings

• Actions on heartstrings and pant legs

• Actions on shirtsleeves

• Acts of war?

• Big jerks

• Canal boats

• Drags along

• Harbor boats

• Harbor craft

• Harbor fleet

• Harbor helpers

• Harbor pushers

• Harbor sight

• Harbor towers

• Harbor vessels

• Harbor workers

• Harbour haulers

• Hard-working boats

• Heartstring stimuli

• Is at war?

• Liner guides

• Liner movers

• Liner pushers

• Port boats

• Port pullers

• Port workhorses

• Pulls

• Pulls (on)

• Pulls hard

• Pulls vigorously

• They have a lot of pull

• They're diesel-powered

• Tots give them to get attention

• Tots' attention-getters, perhaps

• Water towers?

• Yanks