TROLLING TACKLE
downrigger 0010
Downriggers are used to troll and maintain the lure's depth in accordance with the thermocline at which the fish species being sought normally feeds. People began using downriggers in oceans, while others later developed smaller downrigger systems, which are good for smaller bodies of water such as the Great Lakes. They are now used all over the world and catch a large variety of fish.
   USA PATENT
The Commissioner of Patents and trademarks
USA
DEVICE FOR HOLDING A FISHING LINE
MULTILINGUAL AUTOMATIC TRANSLATION