Good Divers Always Live

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I wrote these guidelines for the aquifers on Zezura, but they’ll work here too. Listen to them before EVERY dive. Remember the acronym GDAL: Good Divers Always Live.

1. GUIDE. Do not trust your own sense of direction. Always mark your path.
2. DISTANCE. Your distance from your air supply is NOT A STRAIGHT LINE. You can’t panic-swim up. Do not trust your depth gauge to time your return!
3. AIR. Use one third of your air on descent and exploration. Use one third to return. Reserve one third for emergencies, unless you plan to surface by biobed.
4. LIGHT. Bring multiple light sources. Three lights is two lights; two lights is one light; one light is none.