My experience is similar to Ice Dancers--there are some huge nets out there. Some have cables in them as well as mesh which can be over 1/4" cordage which are heavily tarred. When I have had to cut such nets away, I go over with a very sharp serrated knife and a hack saw with coarse blades. I also agree that you don't really want to do all of the work at night, this becomes far more dangerous with the possibility of the diver being caught in the net. This is also an example that each long distance cruising boat needs to have scuba gear on board (preferable) or an on deck compressor and hair hose. (and certificiation) When dealing with these nets one has to have a harness for the mouthpiece/regulator, so that being tangled with the net will not pull the mouthpiece out of the diver's mouth. I think that the from the swim step knives might work with a single line. However many times lines fouled are polyprop, and quickly fuse from friction heat, so that they have to be cut off the shaft with a hack saw, and don't depend that a knife will cut the line. On the other hand I have gotten some lines off with a boat hook, so you never know. I don't think that spurs type of line cutters would have helped here, because of the size of the net. Regards, Bob Austin