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

Iowa law states that these dangerous operating practices are illegal.

Reckless or Negligent Operation of a vessel or the reckless manipulation of water skis, a surfboard, or similar device is operating in a manner that causes danger to the life, limb, or property of any person.

Improper Speed or Distance is not maintaining a proper speed or distance while operating a vessel. Specifically, it is illegal to operate a vessel:

  • At greater than “slow - no wake speed” in any posted “no wake zone”
  • At greater than 5 miles per hour (mph) within 100 feet of another vessel that is underway at 5 mph or less
  • At greater than 5 mph within 50 feet of another vessel that is underway at greater than 5 mph
  • At greater than 10 mph unless vision is unobstructed for at least 200 feet ahead
  • At greater than 10 mph within 300 feet of shore (except in specially zoned areas) on any inland lake or federal impoundment

Overloading is loading the vessel with more passengers and crew than the capacity number recorded on the Registration Certificate. It is illegal to operate a vessel if its capacity would be exceeded by the persons in the vessel plus the persons being towed on water skis, a surfboard, or similar device.

Overpowering is powering the vessel beyond the recommended carrying horsepower shown on the capacity plate installed by the vessel manufacturer.

Interference with Search or Rescue is operating a vessel in areas in which search-and-rescue operations are being conducted or in an area affected by a natural disaster, unless authorized to be there by the officer in charge of the operation. If authorized to enter, you must operate your vessel at a “slow, no wake speed” and keep clear of all vessels engaged in the search-and-rescue or disaster operation.

Leaving Vessel Unattended is leaving an unattended vessel tied or moored to a dock that is placed immediately adjacent to a public boat launching ramp or to a dock that is posted for loading and unloading. It also is illegal to leave a vessel anchored away from the shore and unattended unless it is attached to a mooring buoy. Permits are required for a mooring buoy. Applications may be obtained through the Iowa DNR.

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The Boater's Guide of Iowa, A Handbook of Boating Laws and Responsibilities

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