The spar torpedo was first effectively used to sink ships during the US Civil War (1861).
The automotive torpedo was first effectively used in the Russo-Turkish War (1877).
The first major use of self propelled torpedoes (automotive torpedoes) was the Russo-Japanese War (1904-05).
All torpedoes mentioned above were launched from torpedo boats or torpedo boat destroyers.
how are torpedoes used present day?
Robert Fulton invented the first naval torpedoes in 1797.
Yes
The Germans
Submarines used torpedoes in anti-shipping roles hoping to cripple the enemies ability to supply and reinforce points of conflict as well as to hamper the enemies economy .