>[!info] See [[Open Waters - Altered Roles]] for water craft exploration rules
Rapid currents and quick trade routes make these waters popular with merchants, but only the bravest and most skilled sailors are willing to chance the frequent, dangerous, and unpredictable waves. Adventurers journeying through this region or along its coast have to overcome an unusually high number of weather event exploration challenges, as well as some combat encounters and social encounters.
- **Terrains.** Coast, water.
- **Tiers.** Regions with calm waters might be tier 1, but most adventurous seas are tier 2 or tier 3.
- **Weather.** 1–7 clear, 8–11 overcast, 12–16 rain, 17–25 mist.
- **Vehicles.** Adventurers move at the speed of their water vehicles.
- **Rolling Mists.** Adventurers gain an expertise die on [[03-Mechanics/6-Ability Scores/Stealth|Stealth]] checks if the weather is not clear.
- **Thick Fog.** Without the sight of natural landmarks to guide them, adventurers have disadvantage on checks made to navigate the area if the weather is not clear.
- **Journey Activities.** Adventurers have disadvantage on checks made to [[Find Shortcuts]] (difficult to find advantageous currents) or [[Scout]]. [[Busk]], [[Light Fervent Fire]], and [[Research the Area]] are possible on coastlines, but not the open sea. Checks made to [[Cover Tracks]] on the open sea automatically succeed, and those made to [[Track]] automatically fail. Checks to [[Hunt & Gather]] are made with advantage.
#### Tier 0
| d100 | Encounter | Type |
| ---- | ---------------- | ---- |
| | Travel Scene | |
| | Social Encounter | |
| | Hail Storm | Expl |
| | Haze | Expl |
| | Stampede | Expl |
| | [[Thunderstorm]] | Expl |
| | Tier 1 encounter | |
#### Tier 1
| d100 | Encounter | Type |
| ---- | -------------------- | ---- |
| | Travel Scenery | |
| | Social Encounter | |
| | [[Pests]] | Expl |
| | [[Private Property]] | Expl |
| | [[Thunderstorm]] | Expl |
| | [[River Rapids]] | Expl |
| | Tier 1 encounter | |
| | Tier 3 encounter | |
#### Tier 2
| d100 | Encounter | Type |
| ---- | ------------------- | ---- |
| | Travel Scenery | |
| | Social Encounter | |
| | [[Cursed Temple]] | Expl |
| | [[Dense Fog]] | Expl |
| | [[Hail Deluge]] | Expl |
| | [[River Rapids]] | Expl |
| | [[Tornado]] | Expl |
| | [[Voracious Pests]] | Expl |
| | [[Wild Magic Zone]] | Expl |
| | [[Sunspots]] | Expl |
| | Tier 2 encounter | |
| | Tier 4 encounter | |
#### Tier 3
| d100 | Encounter | Type |
| ---- | ------------------------------------ | ---- |
| | Travel Scenery | |
| | Social Encounter | |
| | [[Caught in the Crossfire]] | Expl |
| | [[Choking Smoke]] | Expl |
| | [[Cursed Waterway]] | Expl |
| | [[Lifeless Desolation]] | Expl |
| | [[Sunspots]] | Expl |
| | [[Hallowed Ground\|Hallowed Waters]] | Expl |
| | Tier 2 encounter | |
| | Tier 4 encounter | |
#### Tier 4
| d100 | Encounter | Type |
| ---- | ------------------------------------ | ---- |
| | Travel Scenery | |
| | Social Encounter | |
| | [[Divine War]] | Expl |
| | [[Hallowed Ground\|Hallowed Waters]] | Expl |
| | [[Hellscape]] | Expl |
| | [[Killing Cloud]] | Expl |
| | [[Tsunami]] | Expl |
| | Tier 3 encounter | |