Exploring Lilo’s Cave and Recovering the Horn
The flooded caverns beneath the waterways hold valuable equipment left behind by earlier expeditions. Navigating the limestone channels brings you toward deep fishing waters. A regional task asks you to catch three deep fish in Lilo’s Cave. Exploring deeper into the cavern, the primary mission objective is to find the klaxon in Lilo’s Cave.
A personal message left behind by Keeper Lilo sheds light on the history of the cavern. In the note, Keeper Lilo writes: “The Depths have guided me all my life!” The author ultimately decided to leave everything behind, noting that all this junk can stay here. Before departing with the group, Keeper Lilo recorded: “As agreed with the turtle driver, I will close the gates!”
Keys and Outfitting the Vessel
Recovering equipment throughout the complex requires managing several regional keys. One notable item is the Lilo cave key. According to the item description, Lilo left the cavekey behind and set out for the lands where the Voice of the Depths is worshiped.
In development and test records, internal references also record the Default Key. Once you retrieve the acoustic device, the next quest step instructs you to install the klaxon on the boat. Outfitting your vessel often coincides with installing upgrades to survive hostile conditions.
Anglers typically start with a 
Standard Engine. In the database, it is an engine that is easy to repair and maintain, which makes it popular among anglers. Upgrading to an 
Upgraded Engine provides noticeable handling improvements. Thanks to its rebuilt valve mechanism, it noticeably increases the boat’s speed and maneuverability.
For defensive reinforcement, craftspeople install 
Hull Protection. This makeshift-reinforced hull increases the boat’s durability and provides additional protection for you. Crafting these modifications commonly requires harvesting 
Bone Plate material. The item entry describes it as a bony growth that once covered a fish, functioning as a valuable resource for boat upgrades.
Acoustic Confrontation and Beaver Exile
With the boat horn secured in place, your attention turns to resolving water blockages in the district. Obstacles across the canals are tied to animal activities along the waterways. A journal entry titled “Remarkable Beavers” records: “Grandpa said he used to work at a beaver farm!”
While creatures in the swamp can grow formidable, mutant predators also interact with the ecosystem. For example, the mutant is large enough to suck in a beaver or another small animal, but this is extremely rare. Angler objectives state: “Kill the dam-building beaver so the Baron opens the gates!”
To complete the primary campaign progression, steer your trawler toward the signal towers. Specifically, head to the zone where the tuning forks’ sound wave converges. Once inside the acoustic focal point, sound the boat horn to resolve the barrier. As directed by the quest objective, drive the beaver off with the sound of the klaxon.
