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Chapter 4: The Legal Requirements of Boating
Unlawful Operation of a Vessel

Missouri law designates these dangerous operating practices as illegal:

Reckless Operation of a vessel or the reckless manipulation of water-skis, a surfboard or similar device is defined as the failure to exercise the care necessary to prevent the endangerment of life, limb, or property of any person. Examples of illegal reckless operation are:

  • Boating in restricted areas without regard for other boaters or persons, posted speeds and wake restrictions, diver down flags, etc.
  • Boating while under the influence of alcohol or drugs.
  • Chasing, harassing or disturbing wildlife with your vessel.

Improper Speed or Distance is not maintaining a proper speed or distance while operating a motorboat or PWC or while towing a person on water-skis or any similar device. Specifically, it is illegal to:

  • Operate a motorboat or PWC at speeds that may cause danger, injury, damage, or unnecessary inconvenience. Be aware of and obey all regulatory markers, including those marked as idle speed or no wake.
  • Operate a vessel at speeds greater than idle speed or slow - no wake speed within 100 feet of:
    • A dock or pier
    • An occupied, anchored vessel
    • A buoyed restricted area.
    • Areas where damage may be caused from the wake of your motorboat.

Exceeding Night Speed Limit is operating a motorboat or PWC in excess of 30 miles per hour any time from one half-hour after sunset until one hour before sunrise when on the waters of the Mississippi River and Missouri River, and on lakes with a shoreline of more than 160 miles (Lake of the Ozarks, Bull Shoals, Mark Twain, Truman, Table Rock, Stockton, Smithville, and Wappapello).

Overloading is defined as loading the vessel beyond the recommended capacity shown on the capacity plate installed by the vessel manufacturer.

Riding on Bow, Deck or Gunwale is allowing passengers to ride on the bow, gunwale, transom, seat backs, seats on raised decks, or any other place where there may be a chance of falling overboard, unless the vessel has adequate guards or railing. Guards or railings must be at least 6 inches high (not to exceed 18 inches in height) to be considered adequate.

Violating “Skier Down” Flag Requirement is defined as failure to properly display the “skier down” flag or failure to keep a proper distance from a displayed skier down flag. Specifically:

  • An operator of a motorboat (other than a PWC) on the waters of the Mississippi River, Missouri River and Missouri lakes between the hours of 11:00 AM and sunset must clearly display a red or orange flag, at least 12 inches by 12 inches in size, whenever a person enters the water before or after being towed on water-skis or other similar devices. Once the skier is up and being towed, the flag must be lowered. The flag must be raised again when the skier falls or stops skiing and enters the water in order to return to the motorboat.
  • Operators of vessels must not knowingly operate within 50 yards of a displayed skier down flag, unless operating at idle speed or no wake speed
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