THE THING TO NOTICE
Start with independent helm and propulsion inputs, then review what changed in the boat’s motion. All seven current BerthLab configurations use the simulator’s single-outboard control model; changing the boat does not add twin-engine controls.
Separate the two controls
Start with Turn to port and Turn to starboard. Use the same vessel and environment so that the changed steering input is the main difference. The controls accept independent touches: you can change propulsion while holding a helm setting. Accessibility alternatives are available, but a spatial simulation is not a substitute for supervised practical instruction.
Do not use a car-parking mental model
The boat’s orientation and its direction of movement can differ in the simulation. Centering the helm does not remove existing rotation. Selecting neutral does not remove velocity. Treat the control display, the hull orientation and the path as three pieces of information to compare, not three names for the same thing.
Introduce reversing as a separate experiment
Move to the stern-first exercise only after you can identify your input changes on the replay timeline. Observe the response to reverse propulsion and note which end of the hull moves toward the dock. Avoid treating one screen gesture as a maneuver that works for every engine, boat or real-world condition.
Use one change per replay comparison
Change your starting decision or your timing, not every setting at once. If you also switch to a different fleet model, the estimated mass, damping and windage change. Keeping an experiment narrow gives you a more useful explanation than comparing two unrelated successful scores.
Source and limits
This note describes BerthLab’s versioned simulator and recorded-replay behavior, reviewed against the Pilot Edition source. It is not an independently validated on-water training method.
Read the model and editorial methodology · Explore the related exercises