The Scrap-Cannon is a Harpoon Gun from Fisch's The Deep update (Version 1.96), not a fishing rod. You earn it from Sledge in the Outer Deep after four quests in order. Turn in The Deep: Heavy Metallurgy (the fourth quest) with a Crushed Diving Helmet and 30 Chitin Plate, and the gun is yours.
You need The Deep open first. Follow how to enter The Deep in Fisch for the sail, ship, and dive. Once you are under, skip any claim that Scrap-Cannon drops on Sledge's second quest. Finish Restoring 1P-4, Scrap Extraction, and Armored Shells before Heavy Metallurgy.
Find Sledge and finish his quests through Heavy Metallurgy
Sledge waits in the Outer Deep inside a sunken ship near Sector 1P-4 (GPS 1540, -2480, -12025). The Blind Oracle area is a solid landmark if the pin feels fuzzy.
Dialogue can quote different material counts than the quest list. When they disagree, trust the in-game quest tracker.
- The Deep Main Quest: Restoring 1P-4. Gather materials for Sledge. The tracker typically lists 25 Chitin Plate, 20 Salvage Scrap, 1 Refined Scrap / Refined Scrap Scale, and 1 Hardened Chitin. Take the Reinforced Housing he gives you and install it at the Sector 1P-4 tower.
- The Deep: Scrap Extraction. Catch a Broken Flashlight in the Outer Deep and a Bent Harpoon in the Lower Deep. Magnet bait helps both trash pieces. The tracker may ask for one or two Bent Harpoons. Rewards are C$ and XP only, not Scrap-Cannon.
- The Deep: Armored Shells. Catch 3 Big or larger Devil Scorpionfish in the Lower Deep and obtain 15 Chitin Plate. Clear weather and Night match that fish's preferences. Big starts above 2.5 kg.
- The Deep: Heavy Metallurgy. Catch 1 Crushed Diving Helmet in Gloomy Crevice (Magnet bait) and obtain 30 Chitin Plate. Hand both to Sledge for the Scrap-Cannon, plus C$ and XP.
Sledge keeps going after that. Stay on his line if you want the Titanium Shaft for the Titanium Rod craft. That later stop sits with the other Deep rods in how to get every The Deep rod in Fisch.
Scrap-Cannon stats and what it does
Equip Scrap-Cannon, shoot Roaming Fish, and win the pull minigame. It is an early-to-mid Deep harpoon with front-loaded pull progress and a rare-find bias. Later Deep harpoons outclass it for pure power.
| Stat | Value |
|---|---|
| Power | 17 |
| Range | 64 studs |
| Reload | 5s |
| Velocity | 10/ps |
| Resilience | 30% |
| Accuracy | 20% |
| Max Kg | 25,000 kg |
About 30% of catches can roll Rusty, which sells at 0.7x. That is a value-down mutation, not a money farm. You also get +30% progress at the start of the pull minigame, -10% Progress Speed overall, and 3x Rare Finds (raised from 1x to 3x in patch 1.96.1).
If you want a harpoon outside The Deep, the Trident Striker ritual is a separate Desolate Deep vault path.
