Final answer:
Waving to other boaters is a courtesy on the water, while speeding in no-wake zones, anchoring in busy channels, or ignoring boundaries are discourteous actions.
Step-by-step explanation:
An example of showing courtesy towards other boaters and property owners on the water is waving to other boaters. This is a sign of friendliness and respect for others sharing the waterway.
Speeding through a no-wake zone, anchoring in the middle of a busy channel, or ignoring property boundaries demonstrates a lack of courtesy and potentially endangers other boaters and violates property owners' rights.