All vessels should be operated at a speed that allows time and distance to take necessary action to avoid a collision. Obviously, different conditions and levels of expertise will warrant different speeds. Certain areas enforce local speed limits. Check with your local boating authority before heading out on the water to determine speed limits (if any) in your area.
TO DETERMINE A 'SAFE SPEED' FOR YOUR BOAT, TAKE INTO ACCOUNT THE FOLLOWING FACTORS:
The visibility conditions (fog, mist, rain, darkness)
The wind, water conditions and currents
Traffic density, type of vessels in the area and their proximity
Vessel responsiveness (larger, more powerful boats require a larger turning radius and have a higher top-end speed - thus requiring more time and distance to stop)
The proximity of any navigational hazards
YOUR WAKE CAN CAUSE DAMAGE TO PROPERTY AND OTHER BOATS. ALWAYS TAKE INTO ACCOUNT THE EFFECTS YOUR WAKE MIGHT HAVE WHEN ADJUSTING YOUR SPEED.