
1) Barge helper 2) Boat 3) Computer science journal 4) Harbor craft 5) Harbor helper 6) Harbor mover 7) Harbour vessel 8) Maritime rescuer 9) One pulling famous old Queen 10) Port sight 11) She draws ships 12) Small tower 13) Towboat 14) Tower
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https://www.crosswordclues.com/clue/tugboat

1) Towboat
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https://www.crosswordclues.com/clue/tugboat

TUGboat (ISSN 0896-3207) is a journal published three times per year by the TeX Users Group. It covers a wide range of topics in digital typography relevant to the TeX typesetting system. The editor is Barbara Beeton. ...
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http://en.wikipedia.org/wiki/TUGboat

A tugboat (tug) is a boat that maneuvers vessels by pushing or towing them. Tugs move vessels that either should not move themselves, such as ships in a crowded harbor or a narrow canal, or those that cannot move by themselves, such as barges, disabled ships, log rafts, or oil platforms. Tugboats are powerful for their size and strongly built, and...
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http://en.wikipedia.org/wiki/Tugboat

• (n.) See Tug, n., 3.
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http://thinkexist.com/dictionary/meaning/tugboat/

Strong v-hull shaped boat used for maneuvering ships into and out of port and to carry supplies. A ship is too powerful to pull up to the wharf on its own. It cuts power and lets the tug nudge it in. Generally barges are pushed by towboats, not tugs.
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http://www.aapa-ports.org/Industry/content.cfm?ItemNumber=1067

small, powerful watercraft designed to perform a variety of functions, especially to tow or push barges and large ships. In 1736 Jonathan Hulls of ... [2 related articles]
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http://www.britannica.com/eb/a-z/t/90

[
n] - a powerful small boat designed to pull or push larger ships
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http://www.webdictionary.co.uk/definition.php?query=tugboat
tug noun a powerful small boat designed to pull or push larger ships
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https://www.encyclo.co.uk/local/20974

a small, powerful boat for towing or pushing ships, barges, etc. Also called
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https://www.infoplease.com/dictionary/tugboat
No exact match found.