parachute question................. in C-130 General Posted February 17, 2013 Giz Sounds just like I remember. Yes, once the chute was deployed you pulled on the looped red cord and it did the cut. The hook knife was to be used IF the lines didn't cut. Trivia -- the hook was supposed to be the "switch blade" not the knife edge. However, when the manufacture looked at the design they decided there was a mistake and made the standard switch blade knife. Skip Skip, I don't know where you went to survival school or if you've just got CRS. The four-line cut was made on four lines that were marked with red tape. You were supposed to look up and pull them and cut them with the hook blade on the knife. In fact, there was a knife sewed into the riser for just that purpose. I don't think they had even come up with the four-line cut when they started issuing the switchblade knife. I got mine in 1964 when I went on flying status but quit carrying it because I had a hunting knife. There was also a small metal survival knife in a pocket on our survival vests. They showed a film at survival refresher showing how to make the four-line cut.