Mobula parkour so far that I have found:
- Jumping on rails near helm of ship allow one to access the helm and disengage from the helm without having to walk through the cabin
- While running to the center cabin from starboard, you can easily jump the rail near the ladder and even jump onto the rail to jump again to quickly ascend the ladder
- Standing next to the upper port/starboard guns it is easy to simply hop down to the lower port/starboard guns
- You can repair the main engine while standing under it, jumping can help too
- Obvious one: jumping from the top of the cabin to any portion of the ship
- It is possible to get on the stern and tail of the ship
- Last but certainly the most complex: When standing next to a port or starboard turning engine, it is possible to make a circuit of repairing the port, main, and starboard engines without ever having to use a ladder to get back up on the top deck. This is accomplished by jumping onto the railing near a turning engine, hopping onto the platform towards the center of the ship, and then jumping over the large tail beam with multiple jumps in succession, jumping onto the curved tail struts to jump up and repair the main engine, and then proceeding to the other turning engine by jumping over the other large tail beam from one of the curved tail struts and hopping again to the other turning engine
Number 7 is a hard to complete maneuver and even harder to replicate; if it were easily performed, it would be a reliable engine repair method, as it is faster than: repairing the main engine, jumping over to a turning engine, and then running allllllll the way back to the side ladder to run clear across the ship to the other turning engine. This method makes it possible to complete a full true repair circuit as you will not have to backtrack in order to reach every component of the ship.
Again it is very hard to do. Hopefully the other engineer will just be able to get the opposite side turning engine, but this could be useful in situations where you need 2 people gunning and you're giving chase to a ship.