1) Bit of tugboat gear 2) Hawser 3) Item for a tugboat 4) Line 5) Pulling cable 6) Towing line 7) Towing rope 8) Towrope 9) Tugboat gear 10) Tugboat rope 11) Water-skiing need Found on https://www.crosswordclues.com/clue/towline
Tow'line` noun [ Anglo-Saxon tohline . See Tow , transitive verb , and Line . ] (Nautical) A line used to tow vessels; a towrope. Found on http://www.encyclo.co.uk/webster/T/77