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It's good to have a trilobite

Discussion in 'Basic Scuba Discussions' started by Kimela, Sep 17, 2019.

  1. FinnMom

    FinnMom Divemaster Staff Member

    # of Dives: 500 - 999
    Location: Finland
    I added a trilobite to my car too. Once upon a time our insurance company was giving out emergency seatbelt cutters, but they were designed so that you could cut yourself on it by grasping it unawares, or rummaging in a drawer where oneof these had been left. The tribite is a better design: better at cutting what you want cut and better at not cutting you by accident.
    rhwestfall and Bob DBF like this.
  2. HKGuns

    HKGuns Barracuda

    # of Dives: 0 - 24
    Location: Merica
    Thanks, I just ordered one of these.

    I kind of like the Laura Croft look on my right leg, but this sounds like a useful tool.

    I wish there were better dive knives made out of LC200N steel. I have the SpiderCo waterway knife that is utterly rust proof and sharpens really well, but it isn't in a form factor that can be used for diving. Ceramic is certainly able to deal with the elements involved with diving, but it is also difficult to maintain an edge.

    The knife in my AOW thread has a mirror edge on it and will cut almost anything. It is a stainless steel, but stainless isn't really all that stainless.
  3. tursiops

    tursiops Marine Scientist and Master Instructor ScubaBoard Supporter

    # of Dives: 2,500 - 4,999
    Location: U.S. East Coast
  4. mcohen1021

    mcohen1021 Manta Ray

    # of Dives: 1,000 - 2,499
    Location: Texas
    But imagine how exciting the dive would have been had u sliced yourself or your buddy say at Socorro or Guadalupe... :rofl3:
    Kimela likes this.
  5. Bob DBF

    Bob DBF Solo Diver

    # of Dives: I just don't log dives
    Location: NorCal
    It's all a balance between corrosion resistance, ability to harden, and ability to take an edge. A lot of dive knives are really corrosion resistant, but they won't take a real good edge.

    Compare 20 Grades of Knife Steel

    JamesBon92007, HKGuns and rhwestfall like this.
  6. HKGuns

    HKGuns Barracuda

    # of Dives: 0 - 24
    Location: Merica
    Bob DBF likes this.
  7. jgttrey

    jgttrey ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 200 - 499
    Location: Houston
    FWIW, I've found that it is very effective if you take apart a trilobyte, lube up that blade with thick silicone grease -- goop it on in a nice layer -- then reassemble and stick in in the sheath.

    I really don't even rinse mine any more. If I use it, I put some more goop on where it was scraped off during use. That's it. It's very effective. I'll change out the blade every couple of years. Before that, I rinsed religiously, but that's only marginally effective.
    BlueTrin likes this.
  8. BlueTrin

    BlueTrin DIR Practitioner

    # of Dives: 50 - 99
    Location: London
    Trilobites are cool but I had to borrow an old fashioned knife to cut some salami during the interval :)
  9. Scared Silly

    Scared Silly Regular of the Pub

    # of Dives: 500 - 999
    Location: on the path to perdition
    But remember never bring a trilobite to a knife fight.
  10. kablooey

    kablooey Divemaster

    # of Dives: 1,000 - 2,499
    Location: San Diego
    I've gone through the evolution.
    Expensive strap-on BFK, to smaller-cheaper, to zip cutter.
    In twenty-plus years of diving I've probably needed to use a knife less than a dozen times, and never as protection.
    This is what works for me now...
    • Cheap folding knife with thumb button unlock in a velcro pouch on my waist strap. Less than $15 US at the hardware store or swap meet. A friend once told me a story about a diver who dropped an expensive knife on ascent, went back down for it, and got bent. True? I don't know, but it got me thinking about cheap replaceable knives.
    • A zip-cutter (trilobite type) on the bungie wrist mount of my computer, or on my chest strap. This is my second option if I can't reach my folding knife. A second cutting tool is essential in an entanglement.
    This is what works for me.
    I'm not saying it's what works for everybody.


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