Neptunus mounting on double ropes top&bottom 

Mounting on double rope as normally used in Iceland and Canada for catching Greenland halibut.
The length is 90 meters for the top rope and 97 meters for the bottom rope.
The accuracy is the same as done by hand, but it takes only 4 minutes or less to mount one net.
The distance from the net to the bottom rope is 7 cm, and the distance from the net to the top rope is 12 cm.