I don't have a "save-a-dive" kit, as I think they're lame and just another useless thing pawned off on Scuba Divers as a must-have accessory.
I do however, have a fully stocked drybox that goes on every dive with me. Some of the most recently used items include:
* two weeks ago, I used my DS Patch kit for wifie's drysuit. After dive #1, patched a pinhole with Aquaseal and Cotol - went to lunch, came back, it was dry and leak free.
* Zip tie - had to re-clip my boltsnap on my 18w HID. No problem - snipped it off with the fingernail clippers I keep in the drybox, re-tied it, and trimmed it. Finger nail cutters are great for zip ties, as they cut curved and don't leave sharp edges.
JUST TODAY
* Viton Orings - another diver blew an Oring on this trip in her O2 clean tank - all the boat had laying around were rubber Orings. I whipped out a Viton, life was good.
* Yoke insert for Tankzilla - a buddy asked me to bring my second e8-130 - I did. What I didn't know was that the guy he wanted to loan it to had a Yoke reg. No worries, whip out the insert and the Allen Key, and he's diving my Waterheater.
* Back up (photo copy) of my ANDI Safeair card - I forgot my Nitrox card, whipped out the copy this weekend and was able to dive Nitrox
* Today I whipped out the wetnotes on dive #2, and there was no pencil! No problem, I keep half-a-dozen in the box. I must have not zipped my pocket all the way. Got back, and for dives 3 & 4 I was fully armed.
* Qtips - I hate wet ears. Used a few today
* Listerine breath strips - gotta breathe friendly. Used them today.
* Dramamine chewable - used them today. Woo hoo.
* Pressure gauge - used it 3 times today to confirm boat fills before re-assembling the rig
* Mask Defog - 4 dives, four trips to the dry box for this.
* lip stuff - Used it 3 or 4 times today. gotta keep the kisser soft for post-dive festivities...
* Mini flashlight - used it in the prohibitively dark bunk last night / this AM so I could find my stuff.
* Aspirin - took a couple after dive four... no-caffine headache, I think
* Scubatool - my dive buddy used it today to thread my 18w buddylight onto his BP/W bungee rig. Another diver on the boat today used it to replace an HP port in her reg (she was diving wet, and removed the DS hose.) I used it to screw back in the rubber knob on my tank. 3 times in one trip!
* Zipper wax & Talc - used talc a few times today for the DS neck seal, and I always finish the day lubing the zipper. Both are in the drybox.
* Quarters in a film can - used them tonight for parking at the restaurant on the way home (drybox yielding benefits AFTER the dive day!!!)
Another name for a Save-a-Dive kit is a SAD kit. If you're just bumping around with that limp Trident mask/fin-strap-in-a-tube nonsense, you need to shake yourself, do a search on ScubaBoard (for the stuff you need to include) and build a real drybox to carry with you. I have an abbreviated version for dayboats, and a Drybox+ I use on multi-day / vacation trps. I won't do a dive without it.
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Ken