After steam went away, I noticed that diesels have a 'F' painted on one end of the unit. I have been told the 'F' stands for 'front'. There is a running debate at the YWRR about what whistle/horn signals should be given before moving the train. My younger, but more experienced counterpart says that you should always signal your direction of movement according to the 'F' : Hence, if the 'F' is against the first car with the back of the locomotive at the lead, you signal with three toots. I say that if the train is in a dark switching yard and someone not working on your train has no idea which direction the loco is facing, that person would expect the train to start to move backward. I don't understand the thinking about the 'F' on a diesel, but it seems to me the front of a train is that end that has the motive power, and if you are going to move the train one direction or another it should be in reference to where the loco is ... not how it is facing! Any feedback on this to help me understand? Bill "Get Goosed on the Yreka Western"