
1) Aggressive type of diplomacy 2) Armed vessel 3) Boat 4) Military vessel 5) Port threatener 6) PT 109 7) Small armed warship 8) Used by costal patrols
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https://www.crosswordclues.com/clue/gunboat

A gunboat is a naval watercraft designed for the express purpose of carrying one or more guns to bombard coastal targets, as opposed to those military craft designed for naval warfare, or for ferrying troops or supplies. ==History== In the age of sail, a gunboat was usually a small undecked vessel carrying a single smoothbore cannon in the bow, or...
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http://en.wikipedia.org/wiki/Gunboat
[video game] Gunboat is a simulation video game developed and released by Accolade in 1990 for Amiga, DOS, TurboGrafx-16 and ZX Spectrum. It is a combat simulator of a Patrol Boat, River (PBR). ==Gameplay== The game starts out in Vietnam during the Vietnam War. When the player earns a second lieutenant`s bar, the game moves on to battle the...
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http://en.wikipedia.org/wiki/Gunboat_(video_game)

• (n.) A vessel of light draught, carrying one or more guns.
Found on
http://thinkexist.com/dictionary/meaning/gunboat/
Gun'boat` noun (Nav.) A vessel of light draught, carrying one or more guns.
Found on
http://www.encyclo.co.uk/webster/G/67

A gunboat is a small vessel with a shallow draft designed for carrying relatively heavy guns, usually just one. Gunboats are primarily defensive vessels, and were formerly used for patrolling rivers and harbours. Many of them are very swift.
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http://www.probertencyclopaedia.com/browse/RG.HTM

[
n] - a small shallow-draft boat carrying mounted guns
Found on
http://www.webdictionary.co.uk/definition.php?query=gunboat
noun a small shallow-draft boat carrying mounted guns; used by costal patrols
Found on
https://www.encyclo.co.uk/local/20974

a small, armed warship of light draft, used in ports where the water is shallow. · any small ship carrying mounted guns.
Found on
https://www.infoplease.com/dictionary/gunboat
No exact match found.