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

Boating Basics: On the Water

Navigation Rules

There are two terms that help explain these rules.

  • Stand-on vessel: The vessel that should maintain its course and speed
  • Give-way vessel: The vessel that must take early and substantial action to avoid collision by stopping, slowing down, or changing course
Rules: Powerboat vs. Powerboat Rules: Powerboat vs. Sailboat
Head-On Power vs. Power:
Neither vessel is the stand-on vessel. Both vessels should keep to the starboard (right).
Both vessels giving way to the right
Head-On Power vs. Sail:
The powerboat is the give-way vessel. The sailboat is the stand-on vessel.

Powerboat giving way to (going right of) the sailboat
Crossing Power vs. Power:
The vessel on the operator's port (left) side is the give-way vessel. The vessel on the operator's starboard (right) side is the stand-on vessel.

Powerboat on the port (left) gives way to the vessel on the starboard (right)
Crossing Power vs. Sail:
The powerboat is the give-way vessel. The sailboat is the stand-on vessel.



Powerboat gives way to the sailboat
Power vs. Power:
The vessel that is overtaking another vessel is the give-way vessel. The vessel being overtaken is the stand-on vessel.

Powerboat giving way while overtaking another vessel
Power vs. Sail:
The vessel that is overtaking another vessel is the give-way vessel. The vessel being overtaken is the stand-on vessel.

Sailboat giving way while overtaking powerboat
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Online boating safety handbook last modified: July 06, 2009
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