The Deep
The water and sea floor beneath the twilight layer: open black water and the sediment plain under it. No sunlight reaches it, the temperature holds a few degrees above freezing, and food arrives from above as a slow fall of dead organisms from higher layers. It is the largest single environment on a water world and the least visited, because of the pressure.
Crossing it
- Navigate
- DC 17
- Forage
- DC 18
- Notice
- DC 15
Travel is limited by hull rating.
Exposure
-
Temperatures below about zero degrees Fahrenheit, or any water near freezing, made worse by wind.
CON save, DC 10, rising by 1 for each hour after the first. End of each hour. One level of exhaustion.
-
Cold-weather gear
Proper layers, a sealed suit or a heated shelter removes the save. Wet layers give disadvantage on it instead.
-
Immersion
A creature in near-freezing water makes the save each minute instead of each hour, and is Incapacitated at three levels of exhaustion.
-
Gear
Unheated power cells lose half their charge, and any check made with bare hands after an hour of exposure has disadvantage.
-
Adapted
A creature native to a cold world, or with resistance to cold damage, ignores the save.
-
In play
-
Absolute dark
Heavily obscured everywhere. A creature relying on sight is Blinded, and a lamp is the only thing visible for miles.
-
Pressure
Below a hull's rated depth, a vessel or creature takes 2d6 bludgeoning damage per minute. Resistance and immunity to bludgeoning do not apply; only pressure rating does.
-
Marine snow
The constant fall of organic debris is lightly obscuring and defeats sonar returns beyond 120 feet.
-
Cold
Water here is a few degrees above freezing. An unprotected creature counts as being in Extreme Cold.
Variations
-
Midnight water
3,300 feet and down, off the bottom. Open black water with nothing in it for hundreds of feet at a time.
-
Abyssal plain
The sediment floor. Flat for hundreds of miles, soft enough to swallow a landed hull to the axles.
Worlds it occurs on
- Aquan A world that is liquid down to the core, with no land, no shelf and no solid surface to stand on.
- Red An Aquan world with an ocean of blood, called the Sanguine Sea, that no two surveys describe the same way.
- Terran (Oceanic) A world of ocean from pole to pole, with land only where a volcano has kept up.
- Terran (Verdant) A rocky world with liquid water, breathable air and a magnetic field to protect them, rare and the cause of most wars.
Built for this
- Durghuul Ancestry