"naval demonstration" is a correct and usable phrase in written English.
You might use it when referring to a display or show of naval power or equipment. For example, "The British Prime Minister attended a large naval demonstration at Portsmouth harbour to commemorate the Battle of Trafalgar."
After a limited US naval demonstration in the Black Sea, the crisis died away.
Khedive Tawfīq, threatened by ʿUrābī's increasing popularity, requested the assistance of the French and British, who promptly staged a naval demonstration in the bay of Alexandria.
The naval demonstration — known as the Great Green Fleet — was part of a $510 million three-year, multiagency program to help the military develop alternatives to conventional fuel.
Attention is drawn to the fact that, whereas the lukewarm consent of the Powers to a naval demonstration against Montenegro was obtained with difficulty, no plan of action has been agreed upon nor is likely to be.
1937 Nazis Threaten Demonstration LONDON — Great Britain and France flatly refused tonight [June 22] to participate with Germany and Italy in a joint naval demonstration off the coast of Valencia in reply to the alleged attempts by the Valencia government submarines to torpedo the German cruiser Leipzig near Oran, Algeria, last week.
8] after Chancellor Adolf Hitler's government gave a definite assurance to the British government that it had not aided the rebels in the past and would not help them in the future, and that Germany planned no naval demonstration at Barcelona to avenge the murders of Germans in Spain.
Naval force projection — selective, demonstrations of force, essentially an early predecessor to modern "shock and awe" air campaigns — was the means by which the thinly stretched United States military protected far-flung trade routes and American citizenry.
In his later years his health kept him away from some protests, but he was arrested for his part in a demonstration at a naval museum in New York in 2006, and gave his support to the Occupy Wall Street movement.
On this crossing she was protected by, and was escorted into Brest, France, 13 December by ten battleships and twenty-eight destroyers in an impressive demonstration of American naval strength.
The Admiral Kuznetsov – Russia's only aircraft carrier – and its escort of seven ships is one of the biggest demonstrations of Russian naval force in many years.
A playable demonstration of the game's naval combat was showcased at the E3 convention later in July 2008, where it was estimated that the game would ship in 2009.
