Estimates are unknown but very few. Finland had a tiny, primitive navy that they rarely used.However a Large number were destroyed by Finnish mines (Nearly 6400 laid in all).and Naval Sea Planes.Their were very few destroyed by other naval vessals except serveral by Finnish submarines and a number of German ships and Aircraft the Kreigsmarine permitted them to use.
3,000 Allied ships (175 warships; 2,825 merchant ships)
A convoy was a method of sending allied cargo ships across the ocean in company, protected by warships. It was realised that U-boats would search for the convoy and try to attack, which gave the defending warships a chance of attacking the U-boats.
world leaders agreed to limit construction of large warships.
Allied.
103 merchant ships were sunk in world war one
3,000 Allied ships (175 warships; 2,825 merchant ships)
Primarily over 2,000 merchant vessels, with a sprinkling of allied warships.
IJN subs were deployed for "fleet warfare", not merchant raiding. The costly job of sinking allied warships fell to the IJN sub fleet. It's estimated that IJN submarines sank less than 50 merchant ships during the war.
Heavy traffic in patrol boats, merchant vessels, and warships.
Merchant vessels sailing together was known as a convoy, much used in World War II, with escorting warships, and aircraft when possible.
German subs fought "Guerre de Course." (Merchant Sinkings) Japanese subs fought "Guerre de Escadre." (Warships vs Warships) US subs fought both.
Most powerful was the B29 Superfortress. For the axis powers, the Val dive bomber sank the most allied warships.
A convoy was a method of sending allied cargo ships across the ocean in company, protected by warships. It was realised that U-boats would search for the convoy and try to attack, which gave the defending warships a chance of attacking the U-boats.
world leaders agreed to limit construction of large warships.
Finish, not "finnish". Open your history textbook.
Kamikaze were Japanese suicide pilots who attacked Allied warships during World War 2. The kamikaze plane's first flight took place in April 9, 1937.
Your teacher is probably referring to the "Convoy System" that was developed by the British Royal Navy & used by the Allies. It meant that merchant ships with the same cruising speeds traveled together in a group or "convoy". The group may be escorted by Navy warships that were capable of protecting the merchants from German U-boats, Q-ships, or surface raiders. Ships that were very slow, or fast would not travel in a convoy.