Diesel engines have incredible torque for their size.
If it does, surge brakes are required by law. F'rinstance, you can't use 'bearing buddies' to feed the bearings with grease under pressure - some safety thing I guess. For that reason, I prefer to launch and retrieve when there's a crane around. Ten quid each way, and a bargain when it keeps my expensive trailer out of the briny. It's really designed for powerboats, but that's fine for the shallow hulled Chebacco.