A passenger, airmail and light cargo air transport service operated by the State of Trenchtown. Aeropony airships travel on a looping route around the Dusts, such that any of the settlements it services can be reached from any other within a week at most, except in cases of unusual headwinds. The airships are generally quite comfortable, and fares are inexpensive; it is widely believed that Trenchtown operates the Aeropony service at cost (or perhaps even at a loss) for propaganda purposes. Tickets are often sold out at least a week in advance for some trips. Two airship routes operate regularly, designated as C (Clockwise) and A (Anticlockwise). Other destinations, particularly outside the Dusts, are sporadically available from Trenchtown. Aeropony has never had a hull-loss accident despite a number of close calls, mostly involving high winds. The airships have 12 crewmembers (8 crewponies, 4 officers) typically and carry 46 passengers. Aeropony service began in 3321.

(Day 1 is the 1st, 7th, 13th, 19th, and 25th of each month, with the routes cycling five times per month. The extra days in Trenchtown for each ship, since each route takes four days to fly, are used for ship maintenance and crew downtime.)

C airships are Riches of the Abyss and Promise of Ponyism, the A airships are Beloved Trenchtown and Ponies, Unite. If an airship is delayed past its departure time at Trenchtown (usually by unfavorable or dangerous winds) the second airship can still be launched. The two airships on the route are rotated anyway for cleaning and servicing.

A second Aeropony service began shortly after conflict in the Red Barony obstructed the Docktown Railroad, the Aeropony Express. The express is notably more expensive than the regular Aeropony (especially the Docktown-Sparkle City route) and runs a shorter route, and uses a pair of converted whaling vessels, the First Type airships Wild Strike and Golden Horseshoe. It is unclear if the Aeropony Express service will continue if/when the situation in the Red Barony stabilizes. Infrastructure in Sparkle City is shared with the Ducal Hayminnow Airway. A mooring tower is being built in Little Mountain; currently the Express flies over it but does not dock there.

Fleet

The Aeropony operates several types of Airship. Three have been used for commercial service, and two are still in passenger service, the (creatively named) "Second Type" and "Third Type." The First Type and Second Type were converted from whaling vessels, the larger Third Type is purpose-built for passenger and light cargo transport. Third Type airships are the Beloved Trenchtown and Riches of the Abyss on regular service, and Red Skies, which travels on a variety of routes without a specific repeating schedule. Second Type airships are Promise of Ponyism and Ponies, Unite. A Fourth Type of Aeropony airship is used exclusively for State purposes, and is represented by the Crimson Heart and Guiding Star. Trenchtown also operates a large number of whaling vessels engaged in hunting Trench Whales, but they are not considered part of the Aeropony system.

The Third Type airship was designed to support longer, multi-day nonstop journeys. Originally, each passenger cabin was intended to have four bunks, to transport 32 passengers. However, the cabins of two of the three Third Type airships are currently fitted with six bunks, for a theoretical passenger capacity of 48. Only the Red Skies is in its original design configuration, and it is the only one making long nonstop trips, though not on a regular schedule. Second-Type airships have a passenger capacity of 46.

In PRPG3

Control of Aeropony transferred smoothly from Trenchtown to New Trenchtown with the rest of the government, but almost immediately problems began occurring. With the expansion of Harmonia, Aeropony ships were no longer spending most of their time over land that was only ruled locally or was unclaimed entirely; instead, they were operating increasingly in only two countries, with increasingly little wilderness, and they spent most of their time out of territory controlled by their owners. Harmonia was unhappy to have such an important service often deep within its territory provided by a foreign entity it had limited control over, and New Trenchtown increasingly chafed at the restrictions and requirements Harmonia imposed. By not only generating its own tension but also drawing attention to that from other sources, due to its prominence, it's widely believed among those interested in this aspect of history that Aeropony played a significant role in New Trenchtown deciding to join Harmonia when and how it did. As part of the treaty, ownership of Aeropony was transferred from the government of New Trenchtown to the government of Harmonia, which immediately attempted to privatize it.

Private ownership didn’t last very long, since concerns quickly arose over the potential for profiteering and the lack of operational and fiscal transparency of what had become regarded as an essential service. Several cities (New Trenchtown not among them) consolidated their efforts to jointly establish a public non-profit corporation called the Aeropony Group, intended to operate the Aeropony as a public utility. The private coalition controlling the Aeropony resisted briefly, but under increasing pressure from several different polities, allowed themselves to be bought out.

When the seas began to rise and trench whales ceased emerging, the future of Aeropony’s lighter-than-air ships was in doubt due to the supply of buoyant gasses becoming very limited. However, an industrially viable method for creating a suitable substitute gas was developed shortly after, securing the future of lighter-than-air vessels.

Currently, Harmonia continues to employ the Aeropony Group to operate and maintain the Aeropony and its vessels. The Aeropony is publicly funded, making tickets very cheap.

Modern Aeropony ships are smaller than historical flying stock, though carrying the same or higher numbers of passengers. Cargo space is only enough for luggage, not freight, and the passenger density is higher due to shorter flights removing a need for private cabins and large open public areas (though the ships do still have open weather decks accessible to the passengers, as well as small snack bar areas).

Routes

Each stop on a line has two departures per day along that line, one in each direction.