In the game data, the Axe is a melee weapon cobbled together by local craftsmen from whatever they had on hand, while the 
Harpoon Gun is a ranged weapon built by an unknown craftsman. Players also carry a 
Knife, described as a simple knife, alongside the 
Hook Gun for retrieving cargo and clearing obstacles. In the user interface, equipment is divided between a Melee Weapon Slot and a Ranged Weapon Slot.
Equipping and Using the Axe
The Axe is an axe cobbled together by local craftsmen from whatever they had on hand. Its design allows the blade to be upgraded with interchangeable attachments. Press [1] to equip the axe.
Game prompts instruct players to use a melee weapon to destroy objects. During the awakening quest, players must pull the axe out of the ghoul’s head. A later quest objective directs players to gather coral fiber using the axe.
Axe Blade Attachments and Recipes
The base attachment is the 
Axe Blade, a simple axe blade fashioned from a towing hook. It is sturdy, but not particularly effective. Unlocking the Recipe: Serrated Axe Edge item unlocks the Serrated Axe Edge recipe.
The 
Serrated axe edge is a reinforcement plate made from the jaw of a large predatory fish. Its naturally sharpened edges inflict ragged wounds and improve efficiency when smashing crates, breaking rotten doors, and threshing coral overgrowth. The attachment is powerful, but brittle. Crafting the Serrated axe edge at the craft table requires 2 
Jaws, 1 
Metal Plate, 2 Bug slime, and 1 
Rope.
The 
Splitting Axe is another blade module in the craft table recipes. Some might say this attachment is excessively brutal, even for a dying world. However, when you encounter ghouls or smash barrels every day, there is no such thing as “excessive”. Crafting the Splitting Axe requires 2 
Chromatic Scales, 1 Jaws, and 2 Metal Plate.
The Harpoon Gun and Harpoon Ammunition
For ranged encounters, players can take the harpoon gun lying in the control room. The Harpoon Gun is built by an unknown craftsman. It is useful for driving off monsters and breaking objects and obstacles from a distance. Harpoons are used as ammunition for the weapon.
A 
Harpoon is a makeshift projectile for the harpoon gun, though the item description warns not to expect too much from it. At the craft table, 1 Metal Plate crafts 3 Harpoon projectiles. In addition, the glossary notes that the bony spines of 
Sharpfin are often used to craft harpoon bolts, needles, and medical toxins, while Jaws are commonly used to reinforce weapons and craft arrowheads.
Salvage and Obstacle Clearing with the Hook Gun
The Hook Gun is an indispensable tool and faithful companion of most anglers. It helps retrieve cargo and materials from water and land, clear obstacles, and interact with mechanical objects. Losing your Hook Gun is like losing an arm.
During the story quest, players take the hook gun from the ghoul’s claws. Step away from the helm and press [2] to equip the Hook Gun. For complete operational mechanics, consult our Hook Gun Mechanics Guide.
Crafting and Installing Weapon Upgrades
Bait and upgrades for weapons, fishing gear, and tools are crafted at the Craft table in the Dry Dock. In the Craft table menu, you can craft baits, lockpicks, and upgrades for tools and weapons by pressing [N] to open the blueprint book and [V] to pin a recipe. Once all the required crafting materials have been selected, hold [F] to craft the item.
Upgrades for weapons, fishing gear, and tools are installed at the Upgrade table in Betsy & Sons. Quest objectives specifically direct players to install the Serrated axe edge at the rigging bench in Betsy. Each item has upgrade slots, and pressing [LMB] on a slot opens the available upgrades. The upgrade item itself must be in your inventory in order to install it on your item by holding [F]. Upgrades for weapons, tools, and fishing gear are useful, but they do not last forever, and 
Machine oil serves as a lubricant for machinery and weapons that prolongs the service life of mechanisms and tools.