What factor is used to determine a safe boating speed?

A safe boating speed is determined by several factors, including visibility conditions, water depth, the presence of other vessels, and environmental conditions such as wind and currents. Additionally, operators should consider the type of boat, its handling characteristics, and the potential for hazards in the area, such as obstacles or shallow waters. The general rule is to operate at a speed that allows for adequate stopping distance and maneuverability to avoid collisions or accidents.