Hi guys,
There has always been problems with getting ships to stop correctly, Auran admitted that it was not accurate when I asked about it. You may recall the original Auran oil tanker cars, they have a loading pipe attached to the car that is visible when the car stops and is loading, this way the pipe was always correctly located with respect to the car center. Having a pipe as part of the loading industry would never align with the stopped cars.
If you are experimenting with loading use DCC to enable you to stop in the correct location, this should verify that the models work. Under AI, you need to slow the ships down with speed signs. I placed flashing lights and strips on the models so you could locate the center points of ships and industry models.
You could experiment with the trigger radius in the Hulett loader, in the config file, but it is better to get the ships to stop correctly with speed signs so the hatches align with the loader. Be aware that loaded ships take a lot longer to stop than unloaded ones.
Ian