A survival item I rarely see listed is fishing gear. Most of us have way too much fishing gear as is, but salt water is hard on it. All you need is quality reels, hooks, fresh line, and a casting net to get bait.
Great point on the fishing gear! I am working on making my kit better as all I have is the basic military type survival kit....I have emailed Dave Wendell from Bushcraft on Fire for a breakdown on his kit. He has (I have been told) put together a really nice kit.