Which piece of navigational safety equipment is NOT required on towing vessels over 12 meters in length, provided that the vessel remains within the navigable waters of the U.S.?

Correct Answer: Option B — GPS receiver

While 33 CFR and 46 CFR require towing vessels over 12 meters to carry searchlights, approved charts, and VHF radios, a dedicated GPS receiver is not universally mandated as the sole required electronic positioning sensor for domestic internal waters.