Waterway Exploits

I recently had a ‘light bulb’ moment when I was on Discord and got into a conversation about boats/ ships. What happened was that I saw a screenshot of someone’s game with a small double shipping depot added between two forests on what seemed more like a ‘dry dock’ that seemed out of place. So I asked about it and got some amazing information regarding the major differences in shipping compared to other means of transport in OpenTTD.

Some may call these exploits, others may think of them as built in advantages… Either way, there are some fundamental differences with waterways you should be aware of and can legitimately use to your advantage in your next game.

Mastering waterways in OpenTTD allows you to exploit cheap infrastructure for immense mid-to-late-game profits. While ships are notoriously slow in the early game, their unique path-finding rules and infinite capacity allow for powerful mechanics.

Here are the best tips, tricks, and exploits for OpenTTD waterways.

1. Distant Station Exploit (“Passenger Funnel”)

• The Trick: Hold Ctrl while placing a dock to manually link it to an existing station down the line.
• The Exploit: Drop a tiny bus or tram stop directly in the center of a massive city to lock down high passenger generation. Build a dock far away on the coastline and use Ctrl-click to link it to that inner-city bus stop.
• The Result: You can now route hundreds of passengers directly onto massive, high-capacity ships without destroying town buildings or paying massive terraforming fees.

2. Pathfinding Cheat (Depots as Waypoints)

• The Problem: On massive maps, ships can time out or report “no path found”.
• The Trick: Use Ship Depots instead of traditional buoys as your navigational path markers.
• The Benefit: Adding a buoy requires you to manually program it into the schedule for both the forward and return trips. Giving a ship a “Go to Depot” order as a waypoint forces the ship to automatically service itself on the way, completely eliminating breakdowns and streamlining long-distance automation.

3. Infinite Throughput & “Ghosting”

• No Collisions: Unlike trains or road vehicles, OpenTTD ships have completely disabled collision boxes.
• The Trick: 100 ships can occupy the exact same tile and dock at the absolute same time.
• The Strategy: Never build massive, complicated multi-dock terminals. A single dock tile can service an infinite fleet of ships flawlessly.

4. Overcoming Low Station Ratings

• The Problem: OpenTTD calculates station ratings partially based on the top speed of the last vehicle to visit. Since ships are slow, your station rating takes an inherent 17% penalty.
• The Trick: Always use the “Full Load” order modifier for cargo fleets to ensure ships do not leave empty-handed.
• The Counter: Flood the route with an excess of cheap ships. Keeping a vehicle constantly waiting inside the dock guarantees a consistent cargo flow bonus that overrides the speed penalty.

5. Multi-Level Aqueduct Engineering

• The Canal Hack: If an opponent blocks your path or terrain forces elevation changes, you can use locks to lift water uphill.
• Aqueduct Bridges: Use aqueducts to span deep land valleys or run ship channels directly over your complex mainline railway networks.
• Sea-Level Inversion: Build a lock upward, create a flat canal bridge, and drop back down with an opposite lock. This permits you to pass ships cleanly over crossing train lines.

6. Seaplane Exploits

• I go into detail on how to build a Seaport for Oil Rigs on another page. This allows you to send oil from Oil Rigs to pretty much anywhere on the map using refit-able airplanes.