Now that the world has a vertical distance of about 384, I was able to build my ship to no-where at about y=300 from which I dropped the 'up' teleporter by clicking the up/down teleporter with a scrench. The 'down' teleporter was able to find the 'up' teleporter but trying to return up, the 'up' teleporter did not find the 'down' and I was not able to return to the ship. Strangely clicking on the 'up' teleporter with a scrench it was able to find the 'down' teleporter and it rejoined the teleporters. This makes me think this was not a desired behavior but a left over from the 256 limited worlds.

Operating System: Windows 10 version 10.0
Minecraft Version: 1.18.2
Java Version: 17.0.2, Oracle Corporation
forge-1.18.2-40.0.4
Futurepack-1.18.2-33.0.7260

As an aside, the 'move the ship within this dimension with the board controller does work with 1.18.2, at least moving it down the y axis worked.