Sons of the Forest forces players to survive on a hostile island filled with terrifying mutants and hidden mysteries. To fully uncover the secrets buried beneath the surface, you will eventually need to explore flooded tunnels that are inaccessible by default. Securing the scuba gear early in your journey completely changes how you navigate the island's deep cave systems.
Finding the Coastal Cave Entrance
The journey begins along the northern coastline of the island, where the beach meets the vast ocean waves. You need to look closely for a small rock formation that conceals the dark opening of a seaside cavern. This specific cavern is easily recognizable by the wooden boards barricading the entrance, which you must break apart using a basic axe.
Before stepping inside, it is highly recommended to equip a reliable light source like your lighter or a crafted torch. The interior transitions instantly into pitch-black darkness, making navigation difficult without immediate illumination. Additionally, ensure your inventory contains a few basic snacks and medicine to recover from unexpected mutant encounters.
Navigating the Flooded Cavern Tunnels
Once inside the cave, follow the narrow pathway downward as it descends deeper into the earth. The linear path will eventually split into a fork, requiring you to make a deliberate choice on which direction to explore first. Choosing the right side path leads down to a flooded area where your ultimate prize awaits at the very end.
As you descend, you will encounter basic pale mutants that guard the narrow stone corridors. It is best to take these enemies out one by one using a spear or a bow to conserve your stamina. Rushing blindly through the darkness can easily result in getting cornered by multiple threats at once.
Securing the Diving Apparatus
After navigating the narrow walkways, you will arrive at a large underground pool illuminated by a faint light source. The essential diving equipment is sitting clearly on the edge of the stone walkway next to a discarded laptop. Picking up this item automatically equips it to your character, allowing you to breathe underwater indefinitely.
Before diving into the pool to escape, make sure to search the surrounding area for loose oxygen canisters and extra utility items. These resources ensure that your gear remains fully operational for future exploration missions deep under the island. Once fully supplied, you can dive straight into the pool and follow the underwater exit leading back out to the open sea.
Unlocking Advanced Underground Passages
Obtaining this key piece of survival equipment opens up vast exploration opportunities that were previously restricted. Many of the island's most advanced progression items, such as the crucial shovel, are hidden directly behind deeply flooded tunnels. Without the ability to breathe underwater, surviving the late-game caves becomes an impossible task.
Plan your subsequent cave diving expeditions carefully by maintaining a steady supply of extra air tanks in your inventory. You can confidently revisit previously locked cave networks to uncover rare crafting blueprints and deep lore files. Mastering the underwater mechanics completely shifts the survival balance back in your favor.
