Launch Point #4 is located at which docks?

Launch Point #4 is specifically designated at the Lincoln Street Docks, which makes this answer accurate. The Lincoln Street Docks serve as a well-known and established location for launching vessels, particularly in contexts of rescue and emergency operations. This location is likely to be equipped with the necessary infrastructure and accessibility required for rescue operations.

The other locations mentioned may serve various purposes, but they do not serve as Launch Point #4 for the specific training or practical exercises related to the Welland Promotional Rescue Boat program. For example, Grassy Brook Road and River Road may not be developed for such operations, while #18 Colbeck Drive may not offer the necessary facilities to support boat launching. The specificity of Lincoln Street Docks in the context of the question highlights its appropriateness as the correct answer.